The computer does not see hdmi windows 7. Why HDMI does not work on a laptop. The computer does not see the TV via HDMI: causes and solutions

Before you start solving problems, you need to make sure that the latest driver is installed on the video card of your computer / laptop. For this it is necessary determine which video card you have , go to the manufacturer's website and see which version of the driver for your video card is relevant and if you need to update it.

After connecting the TV to the computer, the desktop image is displayed on the TV (i.e. the TV becomes the main screen and the computer screen acts as the secondary screen).

The task is to make the computer screen the main one, and the TV additional.

Solution - right click on the desktop and select " Screen resolution" or go "Control Panel" - "Display" - "Adjust Screen Resolution".

The next step is to determine which screen we have the main (1st) and additional (2nd), for this you need to click " Define". You will see a number on the TV screen" 1 ", on the screen of a computer / laptop a number " 2 ". To correct the situation, you need to click on the screen in the Screen Resolution window" 2 ". tick " Set as primary monitor"and press the button" OK".

How do I change the sound source when connecting a TV using HDMI/DVI?

Those. you have connected everything and everything works for you, but the sound must be switched from the computer to the TV or vice versa. To do this, on the computer, right-click on the speaker icon on the taskbar. if you do not have such an icon, restore it and select " playback device".

In the device window that opens, select the playback device and click the " Default" and " OK".

After connecting a computer / laptop to a TV using an hdmi / dvi / vga cable, the TV shows an empty desktop image without shortcuts, windows, etc.

A similar situation is related to the settings on the computer, in this case the TV works as a screen extension, i.e. it increases the size of your desktop, if you drag a window to the right or left (depending on settings) on a computer / laptop, then part of this window will be displayed on the TV.

If you are not satisfied with such a setting and want the TV to completely duplicate everything that happens on the computer / laptop monitor, in this case, right-click on the desktop, select " Screen resolution".

In the properties window that opens, in the field Multiple Screens select " Duplicate these screens", press " Apply".

If everything suits you, in the confirmation window, click " Save Changes", if not, then you do not need to press anything, after 15 seconds the settings go back.

When connecting a TV with an HDMI/DVI cable, the computer "sees" the TV, but there is no picture on the TV (HDMI mode is selected on the TV).

Solution - the problem is most likely related to a low-quality HDMI / DVI cable and it needs to be changed.

The topic of conversation should have been called "How to connect a TV to a computer via HDMI." Most beginners do the procedure wrong, asking questions that are difficult for a professional to answer. Recall: HDMI is recognized as a high-performance digital interface for the transfer of media content. Images, music, other entertainment content. It will be possible to listen to music from TV, home theater. The HDMI port was invented as a high-performance means of information transfer. We will find out why the TV does not see HDMI, how to fix it.

Connecting a TV to a computer HDMI

Correctly connect the TV using HDMI

Home theater owners should know the truth - the digital media device has a playback source menu. The easiest way to illustrate the fact is on old music centers. Traditionally, devices had three blocks:

Cassette decks: recording, reproducing.
Broadcast reception radio.
laser disks.

Moreover, the blocks refused to play melodies at the same time. It was necessary to switch the section with a special lever. Even a modern phone is often equipped with an FM button ... Have you guessed why the TV does not see HDMI? Move on. The back of a TV usually contains half a dozen output jacks. Between the troops we will find a “tulip” formed by three petals, VGA is bristling at times, without fail - HDMI. Traditionally, the list is not limited to a meager list, see the instructions for more details. From the remote, with a subtle push of a button (with a single HDMI port), you can select the source from the menu. The selector can be the Source key. You need to find a menu listing sources, select the cable connection port. There can be more than two HDMI connectors, it is important to track the number correctly.

The computer usually avoids such tricks. There is no direct option to select the direction of signal transmission. However:

On laptops, the Fn + F3 (F4) function keys will allow you to open a pop-up system menu listing interesting options:

Only computer. There will be no image to the external monitor (TV). Most people choose the named option. Do not be surprised that the TV does not see the laptop.
Duplicate. The laptop screen will be duplicated by a TV. This is what most people need.
Expand. Some people like to drag windows of players, browsers onto the TV, it is more convenient to watch movies. We're afraid to judge (tastes are individual), select the Expand option, extending the desktop.
Only a projector. The laptop screen turns off. The image will be displayed individually on the TV.

Desktop personal computers determine the TV on their own. Otherwise, take the trouble to visit the driver menu, select the desired broadcast port.

It is easier to control the connected TV using the context menu of the desktop. First, right-click a free space, select the Screen resolution option. Successfully detecting a TV makes the Multiple Monitors button available. You will see four options that repeat one hundred percent similar laptop options. See values above. It happens that the computer does not see the TV via HDMI: it makes sense to look here, inspect the context menu. The monitors will be numbered with numbers, you can swap ports, just click, selecting the object for changing system parameters.

The “Multiple Monitors” button is not available in case of inconsistency: the system does not see the TV. Both devices must be switched on (mains supply voltage 230 volts).

Connect TV and computer with cable

Pros say: it is possible to hot-plug a TV and a computer via HDMI. Avoid risking expensive equipment, perform procedures in the absence of power. The first thing to do is turn on the TV. In normal mode, the devices see each other. Faults mean there is a breakdown. Is hot plugging possible or not?

Here is the Wikipedia page http://en.wikipedia.org/wiki/HDMI, in the characteristics of the standard there is the phrase Hot Pluggable: Yes. Translating into Russian, we see the docking of the connectors with the power on. Do you want to be safe? Russia is a place where dealers and manufacturers comply with regulations selectively. It's a pity for the equipment - play it safe.

Which end to start connecting the cable? No difference.

Sound. Connecting a TV to a computer HDMI

Since its inception by the committee (2002), the HDMI interface has been conceived as a combined image and sound transmission solution. See the available audio formats individually (Wikipedia page), we only note that in Windows you need to select the sound source. Now the TV is considered a system device, so these responsibilities can be assigned to it. To do this, it is easier to click the lower right corner of the desktop (speaker icon) with the right mouse button, select Playback Devices from the context menu. If there is no icon in the lower right corner, you need to click the arrow to the right of the RU (EN) language selection symbol, to the left of the clock. There will be a symbol.

After clicking, a window will open: playback devices will be listed. You will need to turn off everything except the TV, and, on the contrary, use the TV. In 90% of cases, after a couple of seconds, the native speakers of the plasma panel will sound. Want Sound Around? A similar speaker system comes with a home theater. Scroll through the description of the device. There are a number of ways to transfer sound from a TV to a home theater, any will do, given the condition that you need to purchase the right cable. Similarly, using the Source button on the home theater control panel, select the desired sound source.

From the TV side, the procedure is often transparent, and the device's own speakers are turned off. Then don't worry if the movie's accompaniment is recorded in mono. Every self-respecting home theater has a splitter inside that easily splits the sound into channels of the Sound Around format.

Q&A: Connecting a TV to a Computer HDMI

The TV does not see the HDMI cable. What to do?

We dare to assume: the TV playback source is incorrectly specified. Check if the target of the computer signal is correct. For the TV, use the remote control. Through the menu or the Source or Hdmi keys, ensure that the source exactly matches the socket where the wire is plugged. For example, if it is HDMI 3, then HDMI 3 should be set in the menu. On the laptop side, use the Fn + F3 or F4 function key (different models on different models) to select the Duplication mode.

PC connection

First get comfortable, then change as you wish. A similar action is performed on a stationary computer, through the context menu of the desktop (column "Change resolution"), both devices must be turned on.

There is no sound on the TV through the HDMI cable, there is an image, what should I do?

The PC audio stream output device is set incorrectly. Click the speaker icon (bottom right of the screen). Fix the issue by clicking Playback Devices. In the window that opens, turn off playback devices, except for the TV speakers. If necessary, also make the instance active (the line will turn green).

The TV stopped seeing HDMI.

We dare to assume that the breakdown was preceded by a change of equipment. A new video card has been installed. Seeing this outcome, the TV could reset the settings. Start over. The guide is above. Check signal source, destination. Any parameters related to sound, image.

The laptop does not see the TV via HDMI.

Select the correct TV output source. The enabled devices should be able to see each other. There is evidence that cables of different versions of the standards are incompatible with the equipment. In the presence of v1.3, the technique worked, the replacement of v1.4 provoked the disappearance of the picture. Sometimes setting up a graphics card requires adding a second monitor manually. Up to date on desktop computers.

You see: there are few reasons (the TV does not see HDMI). Mostly hardware setup. Experts recommend installing a new TV firmware, then turn off the device, pause for 5 minutes. It is permissible to restart the product manually (the menu will help), for each model the exact sequence of actions is different: LG, Sony, Samsung - the device demonstrates its features. Act according to the guidelines. Farewell advice. Be sure to try the ports of the TV one by one, changing the image source through the menu. There were cases when only one of the four HDMI sockets worked, for example, the fourth one. If we watch films, there is no difference, number 1, 2, 3 ...

Readers should understand that the Windows operating system is not perfect. In order for the equipment to work, you have to reboot the devices several times. It happens that the pros ask why digital technology failed? The master shrugs his shoulders, says Windows - Must Die, Linux - well done. We find it difficult to say what the phrase means, but for some reason the difficulties on the forums relate specifically to the paid operating system, and not to the freely distributed one. We see no point in discussing further.

We have prepared detailed instructions for users who are wondering why HDMI does not work on a laptop. Use a few solutions below to fix the issue.

You should note that HDMI does not work on a laptop, mainly due to faulty drivers or settings. However, you should make sure that the problem is not with the HDMI port or cable.

Before following these steps, try simply unplugging the cable from your TV or projector, and plugging it back into the HDMI port.

Also check the connection with another HDMI cable as this may be the problem. If HDMI is still not working on the laptop, then use the following solutions.

Solution 1: Check your display output settings

1. Click Start and click the Settings icon in the bottom left corner.

3. Select Display from the menu on the left, and check if the TV is set as a second monitor.

If the TV is not detected, follow these steps:

1. Simultaneously press Win + P (Windows logo key and P key).

2. Select Recurring from the pop-up menu on the right side.

3. If "Repeated" doesn't work, try switching to "Expand".

After that, you will see the TV in the display output settings.

Solution 2: Update your display drivers

The problem with why HDMI does not work on a laptop may lie in the Windows video drivers. You can go to Device Manager to check the status of the display drivers. Under the Display Adapters category, you'll see Microsoft Basic Display Adapter, Intel HD Graphics, Nvidia Geforce, or others, depending on the graphics card you're using on your laptop.

Follow the steps below to update video drivers using Device Manager.

1. Right-click on the name of the display device and select "Update Drivers".

2. Select "Auto Search" to update the software. Windows will automatically search for and install a new driver.

Please note that Windows does not always provide the latest drivers. In such a case, you will have to download new drivers manually.

You can download and install drivers from the manufacturer's official website. Find out the exact model of your laptop, operating system version, then go to the video card manufacturer's website and download video drivers to your computer.

Ready! Two solutions to the problem of why HDMI does not work on a laptop. If you have any questions, write in the comments below.

In the era of high digital technology, we can get the best from TV and computer through their connected connection. Creating such a special connection between technical devices is possible with the help of DVI, HDMI or VGA connectors. But, often and for various reasons, these devices do not want to make contact with each other. You can always fix existing problems if you know what underlies their occurrence. A rough description of common problems will help you navigate a difficult situation and open up new ways to eliminate them.

What is HDMI?

HDMI is a multimedia interface that transmits high-definition video and digital audio signals. This type of cable is widely used to connect TVs, game consoles, stand-alone video players, and audio receivers to mobile devices and computer equipment. If you have a desire to play a video or show photos on a big screen, then you cannot do without such a device.

Manufacturers of modern multimedia technology are now adding HDMI connectors to the standard equipment of devices by default. There are five main types of such ports, which are marked with Latin letters from A to D and differ in size. In addition, each type of HDMI cable differs from the other in functionality and scope.

It is also worth noting that recently the possibilities and advantages of a wireless connection when connected via HDMI adapters have been widely discussed. Outwardly, they resemble USB-Bluetooth and differ only in connectors.

We connect the TV

Watching movies, amateur videos and photos is much more convenient on the big screen, especially since almost all modern video cards allow you to connect to a TV. The quality of the picture and sound of playback on a computer is significantly different from what you will see and hear if you connect a blue screen to it.

There are such basic ways to connect a TV to a monitor:

connection via VGA interface, which is equipped with almost all modern video cards;
HDMI cable connection (this method is widely used for high-definition signal transmission);
connection via DVI interface, which is universal for digital and analog monitors (originally designed for digital monitors that did not require conversion of incoming signals).

The connection can be realized without using different types of wires. Connection via WIFI allows you to quickly establish contact between the monitor and the screen, and in addition, it frees the house from a web of cables.

Turning on devices

A TV can always be transformed into a powerful multimedia platform if all devices are turned on in the correct sequence.

The connection algorithm is as follows:

The sequence of operations must never be changed. After connecting the devices, they need to be configured.

How to set up the display

Windows 8 and 7 operating systems themselves detect the device and configure the connection if an HDMI cable is used. When using other connection methods, you need to know how to set up the image output on the display yourself.

The algorithm for displaying a picture on the display in windows7 and 8 systems is as follows:

Setting up the display in the windowsXP operating system is always done manually. You will have to press the buttons a little and switch the TV to AV mode.

Video card setup

After the connection is made correctly, a picture from the computer should appear on the TV screen. If the image does not appear, you need to adjust the inputs / outputs and adjust the resolution.

The video card is responsible for all the visual effects and demonstration of multimedia files in the computer. Each of its models has its own characteristics that should be considered when setting up.

But the general algorithm of actions will always be the same:

Successful completion of the connection of two devices will be marked by a system message about the use of an additional screen.

Output sound to TV

Playback of multimedia files will be complete only after setting up the sound card. If you don't, then you're just in for the silent film era.

Sound output to the TV is carried out according to the following plan:

If after making all the settings nothing is played, you need to pay attention to whether the video card supports your sound output method at all.

What to do if the computer does not see the TV via HDMI?

Almost every model of modern TV is equipped with an HDMI connector. Most graphics cards support media output in this way. But if the computer does not see the hdmi TV, you need to find out what is preventing the two devices from connecting.

Troubleshooting includes the following steps:

step one: check the HDMI cable for serviceability and correct connection;
step two: check the system settings and work with a computer via an HDMI cable in the TV menu;
step three: reinstall your video card drivers.

Some types of TVs simply do not support HDMI connections and you should not forget about this. We are talking about (mostly) outdated models that are not equipped with a special connector. In such cases, you can try other connection methods. For example, via DVI or VGA.

Video: the computer does not see the TV

Possible reasons

The disease can be cured if you know the causes of its occurrence. Problems connecting the TV to the computer can be fixed if you know what caused them.

The main reasons why the computer does not see the TV:

connection cable is damaged, incorrectly connected or defective;
the computer does not recognize the TV;
the TV does not support the selected connection method;
video card drivers or their absence;
damage to interface ports;
a removable video card is installed on the computer;
burning of internal parts of a TV or computer.

There can be many reasons for malfunctions in the coordinated operation of two devices. If you are not a specialist, then with confidence you can diagnose only external problems associated with the cable.

We solve the problem

Knowing the causes of the main violations in the symbiosis of a computer and a TV, any problem can be eliminated.

Troubleshooting algorithm:

You should not independently undertake the elimination of problems that only a professional can handle. But elementary mechanical restorations are within the competence of any PC user. Is it necessary to contact the master in order to correct the position of the cable?

No signal from computer to TV

The absence of a signal most often indicates that this TV model cannot be connected via HDMI. It is possible that the connection type is incorrectly marked in the options. In this case, you should try other connection methods.

Photo: connecting a TV to a video card

The reason for the lack of signal on the TV can be viruses, outdated drivers for the video card, and a broken cable. Be sure to check the settings of the video card and choose the correct type of information display. Finally, take a look at the BIOS and check the activity of the connection elements.

Checking the signal through different connections

Truth can be reached by trial and error. If after all the efforts it was not possible to resolve the connection problems, you can check the signal in different connection methods.

The due diligence process is as follows:

If the work done does not make any changes to the existing state of affairs, then most likely the reason for the lack of a signal is some kind of internal breakdown or flaw in the robot's cables and I / O ports.

The development of digital and multimedia technologies has given us the opportunity to enjoy viewing photos, amateur and professional videos on a large TV screen. It is for this purpose that televisions are connected to phones and computers. The connection between two units of equipment, if it is carried out correctly, is established as soon as possible.

But it happens that the image or sound is not reproduced on the TV screen. There can be many reasons for this. It is important to install them so that in the future the problem can be eradicated. Only a specialist can carry out a detailed diagnosis of problems and eliminate them. It is not worth taking on serious restoration work yourself. But this rule does not apply to the elimination of minor and primitive defects.

proremontpk.ru

The computer does not see the TV via HDMI: causes and solutions

Today, almost any television panel can be connected to a personal computer or laptop. The connection of equipment occurs through the HDMI connector. But often users are faced with such a problem that the computer does not see the TV through the HDMI input or there is no sound. There are several reasons why such problems occur, so it is necessary to identify the problem sequentially. Read also which cable to choose to connect the TV.

Ways to connect devices

Connecting a computer or laptop to a TV can occur in different ways:

VGA or D-Sud cable. Almost all monitors, PCs and TVs have such a connector. This is an analog connection that will not convey all the nuances of video files in the best way.
DVI. A more modern version. Can work with analog and digital devices. Has its own subclasses.
S video. In addition to it, you will have to purchase an adapter.
RCA or tulips. Connecting a laptop and a TV in this way is rare.
scart. A popular way, since such a connector is in modern TV models.
HDMI cable. A good option for connecting a computer.

The HDMI connector on a TV is usually located on the back or side. The computer almost immediately after the connection starts to see another device, but there may be problems that there is no image or other errors. At the same time, this is the most proven and common way to connect a laptop to a TV. Read also, ways to connect Xbox to TV.

Common Causes of Connection Failure

If the TV does not see the laptop, and the connection is made, then the reasons may be as follows:

The cable is connected incorrectly or is defective.
Monitor settings error.
Incorrect operation of the video card of a laptop or PC.
The settings on the TV itself or any other brand are not configured.

Let's take a closer look at why the TV does not see HDMI and the second device through it.

Stages of equipment check

First of all, you need to check the quality of the wire connection and the condition of the connectors.
Next, you need to check the correctness of the computer settings.
It then checks for driver updates and graphics card settings.
Run an antivirus program to scan for malware.
Port check. It is recommended that you connect to another device.

Read also, ways to connect a flash drive to a TV.

Cable check

If the TV connected to the PC suddenly stopped working, and up to this point everything was set up properly, it means that the cable has come off or it has been interrupted. The first option is more common, as you can hook the adapter just by passing by. But the second one is less common, since the optimal length of the HDMI cable is not so long as to lie on the floor and fall under someone's heavy leg.

In any case, if there is no image, first of all check whether the connectors are fully inserted into both devices. And are there any foreign objects on the adapter itself. And you can also try to put another cable to make sure that this error does not exist. See also why the TV does not connect to Wi-Fi.

TV settings

When the TV does not see the laptop via HDMI immediately after connecting the equipment, it is most likely that the signal source selection on the TV itself is incorrect.

If there is no signal from the computer, then on the TV remote control you should find the “input”, “source” or “Imput” button, it may be immediately written “HDMI” on the TV from LG. Go to the window that opens and there, in the list of active inputs, select the one you need. Confirm the action by clicking on "OK".

If the equipment still does not connect after the performed operations, we carry out diagnostics further.

Read also how to watch iPhone videos on TV.

Monitor settings

After making sure that the signal from the TV is on the right path, we proceed to the diagnostics of the laptop or PC screen, or rather, to the settings. Any user with basic knowledge of their computer can conduct them:

Move the mouse over any free space on the screen and press the right button.
In the list that appears, select "Screen resolution" or "Graphic characteristics" depending on the type of OS.
Select the appropriate option for displaying the picture on TV. Permissible permission is written in the device passport, stick to it.

Everything is easier to do on a laptop. Hold down the "Fm" and F4 buttons at the same time, hold until the best option is selected. After that, the laptop will connect to the TV correctly and the error that there is no image will go away.

Video card error

Another reason why the device connection does not work is the incorrect functioning of the PC video card. In this case, the laptop does not see another device or does not display an image on it.

To eliminate it, you need to try to install new drivers that are on the global network for each device model. Sometimes it may be necessary to completely reinstall or replace an item.

Read also how to adjust the sound on the TV through a computer.

The last thing that could be the reason that the TV does not receive an image via HDMI is a broken port. For diagnostics, check the performance using other adapters. If the devices become visible, the error lay precisely in this.

Signal Check

If all the manipulations did not bring the desired result, then it is recommended to check the signal using other connection options.

The check is performed as follows:

Disconnect equipment from the network.
Connect the HDMI cable to the computer and screen.
Turn on the TV and press the "Source" key.
In the column that appears, select the mode of operation HDMI, click "OK".
Turn on the computer: during the OS boot, if everything is done, the TV screen and monitor will broadcast identical information.
In the event that the signal does not appear, then you need to go to the "Device Manager" to see if there are still available connectors for connection.

7. For example, if VGA is available, then you need to perform the same algorithm of actions, only set the appropriate mode in the settings.

If even after these steps the equipment did not start working, then most likely the problem is an internal breakdown.

Thus, the computer may not see the TV through the HDMI cable for various reasons that can be diagnosed and fixed at home without special knowledge in the field of modern technology. Read also how to make a TV out of a computer monitor.

TeleVopros.ru

Why the computer does not see the TV when connected via hdmi

Today, any user can connect a laptop as well as a desktop computer to an LCD flat screen TV using an HDMI cable, and then enjoy an expanded picture. Such a connection is not always successful: for example, there may be no sound. But there are times when the computer does not see a TV connected via HDMI at all, although you just purchased the wire in a store where a comprehensive check was carried out. There are many reasons for the incorrect operation of the cable, and the search for the true problem must be done consistently.

We carry out diagnostics

What should I do if the TV does not see the laptop via HDMI? Video cards of all modern products support this connection: HDMI on the TV is installed on almost every model. If the laptop was connected according to all the rules, but there is still no image, then we connect the laptop to the TV, while sequentially checking all possible problems.

Cable check

Not a single product, even the most reliable brand, is immune from factory defects, especially when manually assembled. When buying, the quality of the image and sound are checked, but they never check specific connectors and connection jacks on the TV - at best, they make sure that they are available, and even then not all buyers. It often happens that the cable itself does not work, although it is not used for such a long time. It is necessary to connect the same cable, but to another device, if it functions normally, then the reason that the computer does not see the TV lies in the latter. It is necessary to diagnose the TV for recognition of similar signals.

Checking the signal source

On the remote control (RC), press the button to select the external input option. It depends on the specific product model which button on the TV remote control you need to press: “source” (source), “input” (input) or “HDMI” (LG, Sony or Samsung). After pressing, a menu appears on the screen with a detailed list of active inputs. We select and confirm, by pressing OK or Enter, exactly the desired input, into which the cable coming from the laptop was previously connected.

Monitor operation

If the laptop does not see the TV when multiple monitors are connected at the same time, then additional settings must be made. These simple manipulations can be performed by each user without special education:

move the cursor to any free space on the desktop;
for the menu to appear, click on the right mouse button;
we find the section "screen resolution" - windows 7, and if windowsXP is installed, then "graphic characteristics";
then you need to choose an acceptable option to duplicate the screen.

Any laptop has a specific F4 key, if you press it together with the Fm button (located to the right of Crtl) repeatedly, you can select the desired option for the external screen - this is how the computer starts to see TV.

Video card and drivers

Open the "Device Manager" of your laptop to check the driver versions of the installed video card. Outdated software is the main reason why the TV does not see the laptop. In this case, you need to go to the manufacturer's website, where you can download new "firewood" - the video card will be updated, you will be able to establish the required connection.

Perhaps the fault lies in the fact that the operating system was infected with viruses or there was an unauthorized entry of malware. With the help of a powerful antivirus program (computer protection program) that can find all spies of any level, we carefully scan your computer and reconnect.

Some experts strongly advise you to check the version for your Smart TV platform: sometimes a laptop does not connect via HDMI for this very reason. Update the Smart TV firmware and the problem may disappear.

Connection port failure

Any connector can have mechanical damage or burn out during a power surge, which are not uncommon in our electrical networks. Experienced craftsmen advise connecting the HDMI wire with devices disconnected from the network, even the antenna cable is recommended to be disconnected for this time.

There is also such a very rare reason why the TV does not see HDMI: it simply does not have additional power on the video card, and without this the connection will not work.

You can see all the details and connection options using this video:

Troubleshooting algorithm

If you know the reason why there is no image on the TV screen, then the elimination of various violations is already a solvable task. Here is an approximate procedure for troubleshooting detected problems:

Check the quality of the connection, visually check the external condition of each connector or connecting cables if the laptop has stopped seeing the TV.
Then the system settings of the computer are checked: check what choice was made in the menu items responsible for connecting devices.
Check for updated graphics card drivers.
In some cases, it doesn't hurt to check the settings of the video card itself once again.
Re-scan your entire computer to make sure it's free of malware.
Visually check the state of the multimedia ports, their correct operation - a positive result will be immediately visible when connected to another device, such as a DVD player.

Signal Check

If you've done your best, but your laptop still has no signal to your TV, try other types of connections. Use a rule of thumb where all existing connection methods are consistently used. The due diligence process will look like this:

first, we determine the available connections and connectors that the household appliances we have chosen use;
disconnect TV and laptop from the network;
we connect the laptop to the TV using a proven HDMI cable;
turn on the TV, setting up its connection to the computer using the remote control;
we activate the laptop, if the signal passes, then a picture similar to loading the operating system should be displayed on the TV screen;
no signal - go to the "Device Manager" section, find out what active connection types are available;

if it is possible to establish a connection via VGA, then you need to connect a similar cable to the products;
then we carry out similar actions as with HDMI, only on the remote control we press the "VGA" button;
if you decide to connect via DVI, then connect the cable to the appropriate connectors, select the same option in the TV settings.

If the equipment has not started working together, the reason lies in an internal breakdown that only the master can diagnose and fix. Of course, if you have knowledge in the field of electronic stuffing of devices, you can try to repair the TV yourself.

Technika.expert

The TV does not see the computer through HDMI

HDMI is a popular connector for interfacing various equipment with each other (for example, a computer and a TV). But when connecting, various kinds of difficulties may arise - technical and / or software. Some of them can be solved on your own, to eliminate others, you may need to take the equipment in for repair or replace a faulty cable.

If you have a cable with any intermediate adapters, for example, you can use it to connect to the DVI connector. Instead, it is better to try using a regular HDMI cable that works in HDMI-HDMI mode, since the TV / monitor may not accept a cable that implies the ability to connect to several ports simultaneously. If the replacement does not help, then you will have to look for and eliminate another cause.

Check the HDMI ports on your computer/laptop and TV. Pay attention to these defects:

Broken and/or rusted, oxidized contacts. If any are found, then the port will have to be replaced completely, because. contacts are its most important component;
Presence of dust or other debris inside. Dust and debris can distort the signal, which will cause inconvenience when playing video and audio content (quiet or no sound, distorted or slow image);
See how well the port is installed. If it begins to loosen at the slightest physical impact, then it will have to be fixed either independently or with the help of specialized service workers.

Perform a similar test on the HDMI cable, pay attention to the following points:

You need to understand that not all cables fit all HDMI connectors. The latter are divided into several main types, each of which has its own wire.

Method 1: correct TV settings

Some TV models are unable to independently determine the signal source, especially if any other device was previously connected to the TV via HDMI. In this case, you will have to re-drive all the settings. The instruction for this case may vary slightly from TV model, but its standard version looks something like this:

For some TVs, the instructions may look slightly different. In the 2nd paragraph, instead of the proposed options, enter the TV menu (button with the corresponding inscription or logo) and select the HDMI connection option. If the TV has several connectors of this type, then do the rest in accordance with paragraphs 3 and 4.

If this method did not help, use the instructions for the TV (it should say how to connect via HDMI cable to this particular device) or pay attention to other ways to solve the problem.

Method 2: Computer setup

Incorrect setup of the computer / laptop with multiple screens is also the reason why the HDMI connection is ineffective. If no external displays are connected to the computer, except for the TV, then this method can not be considered, since problems arise if another monitor or other device is connected to the PC or laptop using HDMI (sometimes other connectors, for example, VGA or DVI) .

Step-by-step instructions for setting up multiple screens for devices on windows 7/8/8.1/10 look like this:

It is worth remembering that HDMI is capable of providing a single-stream connection, that is, it works correctly with only one screen, so it is recommended to disconnect an unnecessary device (in this example, a monitor) or select the display mode "Display desktop 1: 2". To get started, you can see how the image will be broadcast to 2 devices at the same time. If you are satisfied with the quality of the broadcast, then it is not necessary to change anything.

Method 3: update video card drivers

It is recommended that you check the specifications of your video card initially, as some graphics adapters may not be able to support two displays at once. You can find out this aspect by viewing the documentation for the video card / computer / laptop or using third-party software.

First, update the drivers for your adapter. You can do it like this:

Also, drivers can be downloaded and installed from the Internet, always from the official website of the manufacturer. It is enough to specify the adapter model there in the appropriate section, download the necessary software file and install it following the instructions.

Method 4: we clean the computer from viruses

Least of all, problems with outputting a signal from a computer to a TV via HDMI occur due to viruses, but if none of the above helped you and all cables and ports are working, then the possibility of virus penetration should not be ruled out.

To protect yourself, it is recommended to download, install any free or paid anti-virus package and regularly check your PC for dangerous programs with it. Consider how to run a PC scan for viruses using Kaspersky Anti-Virus (it is paid, but there is a demo period for 30 days):

Problems with connecting a computer with HDMI to a TV occur infrequently, and if they do appear, they can always be solved. Provided that your ports and / or cables are broken, they will have to be replaced, otherwise you will not be able to output anything.

We are glad we were able to help you resolve the issue.

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Why the TV does not see HDMI

The topic of conversation should have been called "How to connect a TV to a computer via HDMI." Most beginners do the procedure wrong, asking questions that are difficult for a professional to answer. Recall: HDMI is a high-performance digital interface for transferring media content. Images, music, other entertainment content. Can you listen to music on TV? From a home theater it will be possible, have one! The HDMI port was invented as a high-performance means of information transfer. Let's skip a few words, find out why the TV does not see HDMI, how to fix it.

Connecting a TV to a computer HDMI

Correctly connect the TV using HDMI

Cassette decks: recording, reproducing.
Broadcast reception radio.
laser disks.

The computer usually avoids such tricks. There is no direct option to select the direction of signal transmission. However:

On laptops, the Fn + F3 (F4) function keys will allow you to open a pop-up system menu listing interesting options:

Only computer. The external monitor (TV) will not receive an image. Most people choose the named option. Do not be surprised that the TV does not see the laptop.
Duplicate. The laptop screen will be duplicated by a TV. This is what most people need.
Expand. Some people like to drag windows of players, browsers onto the TV, it is more convenient to watch movies. We're afraid to judge (tastes are individual), select the Expand option, extending the desktop.
Only a projector. The laptop screen turns off. The image will be displayed individually to the TV.

Desktop personal computers determine the TV on their own. Otherwise, take the trouble to visit the driver menu, select the desired broadcast port.

The “Multiple Monitors” button is not available in case of inconsistency: the system does not see the TV. Both devices must be switched on (mains supply voltage 230 volts).

Connect TV and computer with cable

Pros say: it is possible to hot-plug a TV and a computer via HDMI. Avoid risking expensive equipment, perform procedures in the absence of power. The first thing to do is turn on the TV. In normal mode, the devices see each other. Problems mean there is a breakdown. Is hot plugging possible or not?

Details Questions and answers

Many users are perplexed: why the TV does not see the HDMI connection if the cable is new, the signal source is working, and the devices were switched according to the instructions. There may be several reasons for this state of affairs, so the search for the problem should be done sequentially. We assume in advance that you are using an HDMI-HDMI cable without any intermediate adapters.

1. Check if the HDMI cable is working. Even very expensive brands are not immune from such a thing as factory marriage. In addition, due to careless operation, the cable may be damaged. You can check the HDMI cable by replacing it with a guaranteed working analog or by connecting it to other devices.

2. Check if you have selected the correct input source in the TV menu. To do this, press the external input selection button on the remote control of your TV. Depending on the TV model, this may be the Source (Source), Input (Input) or just HDMI button. Clicking on it will bring up a menu with a list of available inputs. Select and confirm by pressing the Enter (OK) button the input to which you have connected the HDMI cable.

3. Check if the mode of operation with an external monitor (in this case, with a TV) is selected on your computer correctly. If the TV is the only monitor connected to your computer, then it should be detected automatically. Otherwise, for example, a TV and a display are connected at the same time, additional settings must be made.

On the desktop, you will need to right-click on the free field of the desktop, then go to the menu "Screen Resolution" (for Win7) or "Graphics Characteristics" (WinXP) and select the option to duplicate screens. For laptops, there is a special function button at the top of the keyboard with a monitor icon (usually F4). By pressing it several times simultaneously with the Fn button (for example, Fn + F4), we select the appropriate option for using the external TV screen.

4. Make sure your computer has the most up-to-date video card drivers. In the Device Manager of your computer, determine the version of the graphics card driver you are using. On the official website of the graphics card manufacturer, find the most up-to-date drivers and, if necessary, download and install them on your computer. Sometimes HDMI connection problems occur due to the use of an outdated version of the operating platform of the Smart TV.

Another rather exotic reason why a TV cannot see a computer via an HDMI connection is the lack of additional power on the discrete video card used in it, and working with an external device requires increased energy costs.

I answer all questions in detail.
Friends! Everything you do on your computer, watch movies, cartoons, chat on Skype, play games, view photos, slides or Internet pages in a browser, all this will be shown on your TV screen if the TV is connected to the computer via an HDMI cable. Now, almost every TV has an HDMI input, and most of the video cards produced have an HDMI output.
The HDMI interface was invented in order to connect two high-tech digital devices (they are undoubtedly your computer and TV) and transfer information from device to device without loss of quality. Such transmitted information can be an image and multi-channel high-quality sound. If you have a movie or cartoon on your computer, in any HD, Blu-ray or AVI, MOV, MPG, MP4 format, then you can watch all this on your TV. There are slides or pictures, please see. I'm not talking about games, because I'm not a supporter of them, they take a lot of time from young people, which can be spent on studying. We connect the TV to the computer via HDMI with a second monitor To connect the computer to the TV, we will use an HDMI cable, it looks like this and can be up to 20 meters long, choose the cable of the length you need.

For example, let's take a Samsung TV, not quite a new 4 series (LED type), bought a few years ago, but it already has two connectors for connecting HDMI devices.

The computer that we will use to connect to the TV was also purchased about three years ago, it has an Nvidia video card installed and also with an HDMI connector.

As I said, our TV has two HDMI connectors. On the TV turned off, connect the HDMI cable to the HDMI 2 connector,

We connect the reverse end of the cable to the HDMI connector of the video card of a desktop computer. The computer, in turn, is already connected to the monitor (also Samsung SyncMaster 971P) with a DVI cable.

We turn on the computer and TV. There may not be an image on the TV right away, instead we see such a message “Cable is not connected” “Check the cable connection and source parameter” or “Weak signal or no signal”

On Samsung TVs, to display a list of all available video sources, you need to press the Source button on the remote control (Source).

A menu appears on the TV, in this menu, using the remote control, select the HDMI 2 connector,

Now, on our TV, an exact copy of the desktop of our computer should appear. But again there is nothing, the same error appears on a black screen. So we go to the "Screen Resolution" settings. Right-click on the desktop and select Screen Resolution.

As you can see in the window that appears, we have the second (2) Samsung SyncMaster 971P monitor set as the main screen, and in the “Multiple screens” parameter we have set “Display the desktop only on 2 monitors”, which is why the image is present only on the screen of the computer monitor, but it's not on TV

We bring everything in this window to this state. Choose an option
Multiple screens: "Duplicate these screens"
In the "Screen" parameter, "Multiple monitors" is automatically set, click Apply and OK.

The desktop of our computer appears on the TV.

The resolution of our small Samsung TV is 1366 x 768. If your computer monitor supports this resolution, then it will be set to the same resolution of 1366 x 768 automatically. If not, then either the TV or the monitor will have the wrong resolution. For example, my Samsung SyncMaster 971P monitor has a maximum resolution of 1280x1024. When using a TV and a computer monitor at the same time, the main thing for me is to correctly set the resolution on the TV, otherwise why did I connect it then. I set the resolution to 1366 x 768 on the Samsung TV, the picture is perfect.

And on a computer monitor, this resolution of 1366 x 768 looks like this.

And nothing can be done here. If you want a perfect picture on a TV and a computer monitor, then they must support the same screen resolution, that is, they must have the same characteristics. No sound on TV after connecting TV to computer via HDMI Friends! Do not forget that the HDMI interface transmits video and sound over a single cable, and we can specify in the operating system settings to use the TV's built-in speakers for sound output.
Let's fix the problem by using a TV instead of a monitor. Go Start->Control Panel->

Hardware and Sound->Sound

If you don’t have anything in this field, right-click on an empty space and in the menu that appears, check the items “Show disabled devices”. "Show connected devices"
Now we look at the name of our TV, in my case it is Samsung, you need to turn it on, and turn off the rest. Right click on Realtek and select Disable.

Turn off the speakers too.

Samsung - Enable, Apply and OK.

What is HDMI?

You see - and home theater owners should be aware of this - every media device has a playback source menu. This is easiest to illustrate on old music centers. Usually they had three blocks:

Cassette decks, recording and reproducing.
Radio for receiving broadcasts.
laser disks.

Moreover, they could not work for playback at the same time. It was necessary to switch the section with a special lever. Even a modern phone often has an FM button ... Haven't figured out yet why the TV doesn't see HDMI? Then let's move on. There are usually multiple output jacks on the back of the TV. Among which you can find a "tulip" of three petals, from time to time VGA, and HDMI. The list is usually not limited to this list, see the instructions for more details. From the remote control, with one press of a button (with a single HDMI port) or a menu, you can select the source. It can also be the Source key. In general, you need to find in the menu where the sources are listed, and select exactly the port to which the cable is connected. And there can be 2 or more HDMI connectors, it is important not to confuse the number. (See also: Why the TV does not see the hard drive)

A computer usually does not need such tricks. And, accordingly, there is no direct option on it where to transmit the signal. However:

Symptoms:

Good afternoon, Lesya

Obviously, the PC needs settings. Set the PC resolution to match the values supported by the TV:
640 x 480 - 60Hz
800 x 600 - 60Hz
1024 x 768 - 60Hz
1280 x 768 - 60Hz
1280x1024 - 60Hz
1360 x 768 - 60Hz
1440 x 900 - 60Hz
1680 x 1050 - 60Hz

Good afternoon, Vyacheslav.

With laptop settings of 1360 * 768 60Hz, the image is just troit.
With other resolutions of those that you wrote, the video does not play at all (just a black screen on the TV screen).

30.07.2014, 17:24

PC - Windows 7 64

01.08.2014, 12:13

Computer stopped seeing TV via HDMI

PC - Windows 7 64

Problem: Nothing was updated, nothing changed - just stopped seeing at one moment.

What I did: rollback the system on the computer, rearranging the drivers to old / new ones, updated the TV software.

Is it possible that the HDMI ports on the video card and on the TV burned out?

Good afternoon, WaterMan4EG

Failure of the HDMI ports of the TV is possible in the event of a "hot" connection / disconnection of HDMI cables to them. Therefore, the TV must be powered off before connecting/disconnecting HDMI cables. Try connecting another device to the TV, use a different cable if no picture is output.

Philips TV - Victor

14.08.2014, 01:06

In TV mode via HDMI, the image is worse than on VGA. In PC mode, the image is like on VGA, but black borders remain at the edges of the screen, that is, autofill is turned off. Is it possible to enable autofill in PC mode or adjust the image in normal mode to look like VGA?

Good afternoon!

Try to check the output settings of the video card (Resolution - 1080p, frequency - 60Hz). After that, select, using the button on the remote control TV format, the item "Not to scale".

Philips TV - Victor

15.08.2014, 17:56

Nothing has changed, except for the monitor resolution, it has become 1920x1080. The stripes along the edges remained, both in PC mode and in normal mode.

Tell me, did you select the image format "Not to scale"?

10.09.2014, 14:35

10.09.2014, 16:36

I have a 32PFL7404H / 60 TV, I purchased a Denon AVR-X500 AV receiver. I can not connect either via HDMI (tried different cables and all 4 inputs), or via VIDEO. Writes no signal. What could be the problem and how to make them friends?

Good afternoon Day Anger

10.09.2014, 16:47

Good afternoon Day Anger

Check whether the image is output from other devices connected to the TV, is the image displayed when the receiver is connected to another TV?

12.09.2014, 17:50

If the PC is connected directly to the TV, then the picture is there, on the Samsung TV the receiver works flawlessly.

Good afternoon Day Anger

Specify whether you tried to add a device through the appropriate menu item? If so, what device is the receiver added as?

08.11.2014, 08:10

Good afternoon, WaterMan4EG

Try connecting another device to the TV, use a different cable if no picture is output.

16.12.2014, 18:15

And I have such a problem - I had a Radeon 5770, I connected philips 32pfl6636t / 12 to it via HDMI, everything worked fine !!!
I bought myself a Power Color Radeon R9 270 and I can’t connect my Philips to it via HDMI writes - Unsupported video format (((((
At the same time, Catalyst sees it!
I put 5770 again, everything sees, everything works fine!
Drivers new 14.9. Even reinstalled Windows and nothing!
Help please good people!!! Thanks in advance!

17.12.2014, 16:58

I tried the neighbor's computer - the same effect - "No video signal". Is it possible that because of the software update the TV does not detect HDMI?

Good afternoon, WaterMan4EG.

Is the image output from other devices? If not, then there is a possibility that the HDMI port is out of order.

Julia Orlova

22.12.2014, 23:00

Good afternoon!

Good afternoon! When connecting the Game Console or PC to the TV via the HDMI port (tried all 4 outputs), the screen does not display an image, it says that there is no signal, the PC at that moment sees the TV and detects it. What could be the reason?
Model 42pfl6805h.

24.12.2014, 17:45

Good afternoon!

Previously, we connected our old 42PFL3312S / 60 to a video card on a Radeon PC (I don’t remember which one) via DVI-HDMI. Then they changed the video card to NVIDIA Geforce 7300 GT and the problems started. The computer sees TV, and the image on TV appears only for a couple of seconds (when the PC is loaded, when the extension is changed on the PC, that is, ONLY while setting up the PC on TV). Then the image on the TV disappears, the screen is blue, and the TV writes: "Video not supported". What could be the reason?

Good afternoon, Yulia Orlova.

Set your PC settings to one of the following monitor settings:
640x480 @ 60Hz
800 x 600 @ 60Hz
1024x768 @ 60Hz

24.12.2014, 17:59

5. Check your computer's operating system for viruses and malware. You should check your computer with any effective anti-virus program with fresh signatures.

6. Check the health of the HDMI ports on the TV and external signal source. Connectors can burn out or be mechanically damaged due to repeated incorrect cable connection. Although the HDMI standard allows for a “hot” connection of the cable, experienced experts recommend that at the time of switching, not only turn off both devices from the sockets, but also disconnect the antenna cable from the TV jack.

On LG TVs, this is such a button (INPUT):

Click on it and select our HDMI connector to which we connected the cable (it will be active).

The resistance should be no more than a few ohms. Well, if this is the case, but if it is larger or the tester does not show anything at all, and the cable is long, then you need to connect it with an additional wire.

The main reasons why the computer does not see the TV:

connection cable is damaged, incorrectly connected or defective;
the computer does not recognize the TV;
the TV does not support the selected connection method;
video card drivers or their absence;
damage to interface ports;
a removable video card is installed on the computer;
burning of internal parts of a TV or computer.

We solve the problem

Knowing the causes of the main violations in the symbiosis of a computer and a TV, any problem can be eliminated.

Troubleshooting algorithm:

Most likely, a change of equipment was made before this. For example, a new video card is installed. Seeing this outcome, the TV could also reset the settings. Start over with our guide above. Check the signal source, destination, etc. This applies to both sound and picture.

What to do if the laptop does not see the TV via HDMI?

Most likely, you need to select the correct source on the TV. The enabled devices should be able to see each other. There is evidence that cables of different versions of the standards are not always compatible with the equipment. So in the presence of v1.3 everything worked, but with v1.4 the picture does not appear. Sometimes you need to manually add a second monitor in the graphics card settings, but this is more for desktop computers.

How to switch? Like I said, read the instructions. One way or another, it is unlikely that it will be possible to switch the output programmatically (through the BIOS and, moreover, through the driver) - most likely, this is done physically, using a special. jumpers on your motherboard (if using an onboard video card), or on the video card itself.

The topic of conversation should have been called "How to connect a TV to a computer via HDMI." Most beginners do the procedure wrong, asking questions that are difficult for a professional to answer. Recall: HDMI is a high-performance digital interface for transferring media content. Images, music, other entertainment content. Can you listen to music on TV? From a home theater it will be possible, have one! The HDMI port was invented as a high-performance means of information transfer. Let's skip a few words, find out why the TV does not see HDMI, how to fix it.

Connecting a TV to a computer HDMI

Correctly connect the TV using HDMI

Cassette decks: recording, reproducing.
Broadcast reception radio.
laser disks.

The computer usually avoids such tricks. There is no direct option to select the direction of signal transmission. However:

On laptops, the Fn + F3 (F4) function keys will allow you to open a pop-up system menu listing interesting options:

Only computer. The external monitor (TV) will not receive an image. Most people choose the named option. Do not be surprised that the TV does not see the laptop.
Duplicate. The laptop screen will be duplicated by a TV. This is what most people need.
Expand. Some people like to drag windows of players, browsers onto the TV, it is more convenient to watch movies. We're afraid to judge (tastes are individual), select the Expand option, extending the desktop.
Only a projector. The laptop screen turns off. The image will be displayed individually to the TV.

Desktop personal computers determine the TV on their own. Otherwise, take the trouble to visit the driver menu, select the desired broadcast port.

The “Multiple Monitors” button is not available in case of inconsistency: the system does not see the TV. Both devices must be switched on (mains supply voltage 230 volts).

Connect TV and computer with cable

Pros say: it is possible to hot-plug a TV and a computer via HDMI. Avoid risking expensive equipment, perform procedures in the absence of power. The first thing to do is turn on the TV. In normal mode, the devices see each other. Problems mean there is a breakdown. Is hot plugging possible or not?

Which end to start connecting the cable? No difference.

Sound. Connecting a TV to a computer HDMI

Since its inception by the committee (2002), the HDMI interface has been conceived as a combined image and sound transmission solution. See the available audio formats individually (Wikipedia page), we only note that in Windows you need to select the sound source. Now the TV is considered a system device, so these responsibilities can be assigned to it. To do this, the easiest way is to click the lower right corner of the desktop (speaker icon) with the right mouse button, select Playback Devices from the context menu. If there is no icon in the lower right corner, you need to press the arrow to the right of the language selection symbol RU (EN), to the left of the clock. The symbol will be there. Find.

After clicking, a window will open: playback devices will be listed. You need to turn off everything except the TV, and turn it on - the TV - on the contrary. In 90% of cases, after a couple of seconds, it is the native speakers of the plasma panel that will start yelling. Want Sound Around? Typically, such an acoustic system comes with a home theater. Scroll through the description of the device. There are several ways to transfer sound from a TV to a home theater, any will do, given the condition that you need to purchase the right cable. Similarly, using the Source button on the home theater control panel, select the desired sound source.

From the TV side, the procedure is often transparent, and the device's own speakers are turned off. Then don't worry if the movie's accompaniment is recorded in mono. Every self-respecting home theater has a splitter inside, which will easily split the sound into channels of the Sound Around format.

Q&A: Connecting a TV to a Computer HDMI

The TV does not see the HDMI cable. What to do?

PC connection

There is no sound on the TV through the HDMI cable, there is an image, what should I do?

The TV stopped seeing HDMI.

The laptop does not see the TV via HDMI.

You see: there are few reasons (the TV does not see HDMI). Mostly hardware setup. Experts recommend installing a new TV firmware, then turn off the device, pause for 5 minutes. You can restart the product manually (the menu will help), for each model the exact sequence of actions will be different: LG, Sony, Samsung - the device demonstrates the features. Act according to the guidelines. Farewell advice. Be sure to try the ports of the TV one by one, changing the image source through the menu. There were cases when only one of the four HDMI sockets worked, for example, the fourth one. If we watch films, there is no difference, number 1, 2, 3 ...

Readers should understand that the Windows operating system is not perfect. In order for the equipment to work, you have to reboot the devices several times. It happens that the pros ask why digital technology failed? Well done shrugs, says Windows - Must Die, Linux - well done. We find it difficult to say what the phrase means, but for some reason the problems on the forums concern the paid operating system, and not the freely distributed one. We want to say goodbye, because the problem has run into. We see no point in discussing further.

Connecting a computer or laptop to a TV can occur in different ways:

VGA or D-Sud cable. Almost all monitors, PCs and TVs have such a connector. This is an analog connection that will not convey all the nuances of video files in the best way.
DVI. A more modern version. Can work with analog and digital devices. Has its own subclasses.
S video. In addition to it, you will have to purchase an adapter.
RCA or tulips. Connecting a laptop and a TV in this way is rare.
scart. A popular way, since such a connector is in modern TV models.
HDMI cable. A good option for connecting a computer.

Common Causes of Connection Failure

If the TV does not see the laptop, and the connection is made, then the reasons may be as follows:

The cable is connected incorrectly or is defective.
Monitor settings error.
Incorrect operation of the video card of a laptop or PC.
The settings on the TV itself or any other brand are not configured.

Let's take a closer look at why the TV does not see HDMI and the second device through it.

Stages of equipment check

First of all, you need to check the quality of the wire connection and the condition of the connectors.
Next, you need to check the correctness of the computer settings.
It then checks for driver updates and graphics card settings.
Run an antivirus program to scan for malware.
Port check. It is recommended that you connect to another device.

Cable check

TV settings

When the TV does not see the laptop via HDMI immediately after connecting the equipment, it is most likely that the signal source selection on the TV itself is incorrect.

If the equipment still does not connect after the performed operations, we carry out diagnostics further.

Monitor settings

Move the mouse over any free space on the screen and press the right button.
In the list that appears, select "Screen resolution" or "Graphic characteristics" depending on the type of OS.
Select the appropriate option for displaying the picture on TV. Permissible permission is written in the device passport, stick to it.

Video card error

Another reason why the device connection does not work is the incorrect functioning of the PC video card. In this case, the laptop does not see another device or does not display an image on it.

To eliminate it, you need to try to install new drivers that are on the global network for each device model. Sometimes it may be necessary to completely reinstall or replace an item.