The display does not turn on when there is an incoming call. Why does the screen go blank on android during a call. Causes of problems with the proximity sensor when the screen goes blank during a call

Spontaneous freezes and glitches of the iPhone, unfortunately, are no longer uncommon. This worries many, but Apple does not seem to be going to do anything.

Our reader Alexander described the problem best:

This glitch really infuriates: a black screen appears on the iPhone 7 and 7 Plus. For example, when a call comes in, the screen simply does not light up (vibration only and the sound of the call), while responding only to the power button. Click on home button at least a hundred times, the screen does not light up, but the vibration feedback clicks and that's it.

We recommend that you perform this procedure regularly, even if your phone does not have visible problems. Using the Volume Down key, highlight the "wipe cache partition" option and press the Power key to select it. When clearing the cache partition is complete, highlight "Reboot system now" and press the "Power" key.

Press and hold the volume up button and the home button.
Home button and Volume Up.
Volume up key.

If you suspect that the problem may be software in nature, the most fast way fix it - just erase everything and start again from scratch.

It happens periodically several times a day, I did not reveal any sequence leading to this. To be honest, I’m already tired, I don’t have the strength to endure this disgrace, I want to shoot an iPhone against the wall, it infuriates me, I’m already ready to sell both.

Such a problem really exists, and the described case is far from the most difficult.

Why is this happening

"Black Screen of Death" is a relatively new concept for iPhone users, we have rarely encountered such system failures before. Most often, this was solved by a banal reboot or firmware update.

This can be done through a wizard or a factory reset. Performing this procedure will erase everything from internal memory phone, so be sure to back up important files such as photos, videos, contacts, etc. before continuing.

If you haven't tried this step before, follow these steps. When it gets to the Home screen, start setting up. . For questions about your calls, make sure you ask your carrier for help. Dropped calls can be a completely different issue on the operator's part.

Now almost every user of "apple" technology has seen such failures on their device or on the device of friends. A black screen can appear on most models, regardless of iOS version.

There are several main reasons for this strange glitch:

1. Mechanical failure

A black screen often appears on devices that have been in water. Even new iPhones 7 with protection against moisture ingress sin this. It is not necessary to drown the smartphone for this. It is enough to actively use it in a humid environment, in the rain or splash the device several times.

Send your phone in for repair or ask for a replacement

Now, if all these procedures fail to fix the problem, you can assume that a hardware failure is the culprit. If the phone is still under warranty, make sure you can replace it. This is because the phone was brand new. You have great service, thank you. - John. To isolate which of these is the cause, follow the solutions provided by Jane. Too many devices using the same connection can severely impact data throughput.

It is not possible to establish 100% that a black screen began to appear on the device after getting wet in any service center. However, the adoption of "water procedures" with a smartphone will be another reason to think about the causes of such glitches.

2. Problematic software

Every year iOS becomes more open, developers can embed their modules in many standard programs. This may affect the operation of iOS.

If you are one of the users experiencing a problem with your device, please let us know. We cannot guarantee a prompt response, so if your issue is time sensitive, please find another way to resolve your issue. When describing your problem, please be as detailed as possible so that we can easily identify a suitable solution. If you can, please kindly include the exact error messages you are receiving to give us an idea where to start. If you have already tried some of the troubleshooting steps before submitting e-mail, be sure to include them so we can skip them in our responses.

Any system update can bring a piece of code that does not fit well with existing applications or settings.

Only a complete cleaning of the device with firmware recovery can minimize the chance of a black screen, but not everyone can take such measures. Not everyone wants to turn their iPhone for 50 thousand into a test site.

If you find this post helpful, please help us by spreading the word to your friends. Of course, to be among the top 3, if not to win. This is not only a beautiful smartphone, but also powerful and has many features. But like any technology, it doesn't always go against the grain.

Issue: Screen randomly turns on

Some people have reported that their display seems to turn on in a random fashion. There is no message, no incoming call or any other notification, but the display still lights up. If this is not the case, the following solutions can try out or at least find an explanation.

3. Battery problems

Masters service centers note that often the cause of a black screen can be problems with the battery. An old, worn out battery can cause this.

On new gadgets, a black screen is often caused by an overheated battery. This can happen even on a fully functional device with a long connection to the charger.

Issue: No notification sound

If this happens to you, try the following. Press and hold the power button and lower volume rocker until the phone reboots. You can set whether you want to worry while playing or not. So we return to safe mode and check if it exists.

Problem: Wireless charging is too slow

This should temporarily fix the issue, but it may also come back.
The volume of ringtone, media, notifications and system is configured independently.
If you press the volume button, the slider will open for control.
You can install all components using the arrow in the upper right corner.
Checks app notification settings.
Check this!

However, some people say it can take up to four hours or more.

What can be done

Unfortunately, there is no advice that helps in 100% of cases. We can offer such methods of "treatment".

1. For starters, make sure you're not running a beta version of iOS, completely from getting test builds.

2. Charge your smartphone. Don't keep your iPhone on charge all night and stick to using your gadgets in the winter.

Issue: Too sensitive touch screen and keys

If you are also a part of it, try these possible solutions.

Each application often has a lot of useless features. Unfortunately, some pre-installed applications cannot be reset, but you can, by at least, deactivate them. If you decide to get rid of everything, you must, unfortunately, harden your device. The most obvious thing you can do is remove everything you don't need. . Many people on the support forums complain that the touch screen and navigation bar are simply too sensitive.

3. Discard applications that are built into system programs. Right now in App Store Lots of iMessage add-ons, Safari add-ons, Phone widgets, third-party keyboards, and more. All of them are built into the system and can affect its operation.

4. Disable feature Raise To Wake (Settings - Display and brightness - Raise to wake), which is responsible for turning on the display when the user picks up the iPhone, or Opening with a finger (Settings - General - Accessibility - Home - Open with a finger).

Battery problems

This results in random launching of applications or easy selection. Sometimes it is enough to hang over the button. Protective film for the screen in some cases helped, because it reduces the sensitivity.

Lids cell phone may affect screen sensitivity.
Removes it once and tests if it matters.

There are reports of overheating, causing the device to become excessively hot in the early days. if you have mobile phone for one day, then let him install applications and games alone.

It happens that it is the simultaneous operation of these two options that leads to failures in the system.

5. If all else fails, you can reset your iPhone to factory settings and use your smartphone by gradually adding apps from the App Store and making changes to settings.

Yes, the output is not the best, but this is the only way to determine exactly what exactly leads to the appearance of a black screen in a particular case.

Because it might be a little hotter. If the issue still occurs, try the following. If your device gets very hot while charging, this may be due to the fast charging feature. If you find that your device is heating up even though you are not using it, this may be the reason. Activate some app there because it should prevent apps from generating heat in background. Turn off your phone, then press and hold the Home, Volume, and Power buttons together. Use the bottom volume control to scroll to "wipe cache partition" and select that point with the power button. If the problems are still present, you should clear the cache partition. . Available options are "View" and "Extract".

We wish you not to get into such situations, and if you do, find the right way out faster. Happy holidays!

Hot Apple News:

A fairly large number of phone users are faced with a problem when phone screen goes blank during a call and nothing can be done. At this moment, the buttons do not work, including the power button, the sensor does not respond to any actions, and the only way to return everything back to normal is to pick up or hang up the phone at the other end.

Issue: Home and multitasking keys not working

The message can be removed by clearing it, but it will be returned after every restart. Apparently this happens to some people too.

There are several things you can try to combat lag.

First, you can clear the cache partition.
Disables power saving mode or trying to turn on the game tools.

Some complaints about the Home button and Multitasking. Most of the time they work as usual, but sometimes they fall out. The back button should work.

In most cases, this problem is related to the proximity sensor. But there can be quite a lot of problems with it.

I came across such problems, I didn’t read much about them until I had such a problem myself, twice. For the first time, this problem appeared with the Chinese copies of Samsung S5. Second time with Xiaomi Mi4. No, it's not about Chinese phones Well, that's just how it happened to me. When I was looking for information why my screen goes blank during a call, I did not find such problems with Chinese replicas. Typically these were factory Samsung, HTC, Nokia, and rarely Sony. I did not find any mention of a blank screen during a call on Chinese devices. And this confused me a lot, since many advised to flash the device, and it is difficult to flash the Chinese device.

The call is automatically terminated

It is also possible that third party application caused an error. Return to safe mode. Again, a factory reset can be an advantage.

A simple restart might fix the problem already.
Perhaps the application is also to blame for this problem.
See what you installed last and throw it away.
Do the keys work as usual?
Okay, you have a solution to the problem!

Very often they had to wait for some important calls, but as soon as they tried to receive it, it was interrupted. This is of course very annoying as it happens without warning.

However, after moving from the phone user forums to the tech forums, I concluded that the problem was not with the firmware, but with the proximity sensor. The proximity sensor is installed on any modern phone. Its main function, when it detects obstacles at a certain distance (your cheek is an obstacle), it turns off the screen to save energy, and also blocks the buttons so that you do not accidentally press unnecessary buttons with your cheek or fingers during a call. After you have spoken and removed the phone from your ear, the sensor detects that there are no obstructions and unlocks the phone for further use. This is if in simple terms. And when there are any problems with the proximity sensor, the screen goes blank during a call and you can't do anything.

The mobile phone starts a call, but you cannot understand its opposite.

The typical approach to this problem is to reboot the phone. If the problems are fixed, then a mandatory system reset is no longer required. If they ever experienced that they called but their conversation partner suddenly hung up? This is actually a very common problem. Obviously, her interlocutor did not understand you, so he decided to hang up. This problem can be solved by turning the loudspeaker off and on again by pressing the corresponding icon until you hear the other person.

As a rule, such problems happen for several reasons.

The first reason is the phones after repair. Non-certified centers, and many private traders, forget to put an elastic band on the sensor, or put it on crookedly, as a result of which, in the first version, the sensor dangles freely and falls into the dead zones under the plastic; in the second case, the rubber band covers the proximity sensor. In these cases, the best option is to take the phone back to the unfortunate master and have him do everything right. You can try to disassemble it yourself, but I'm not a fan of disassembling devices where there are no bolts.

If you try to make a call and suddenly disconnect, this may be a sign that the sensor or the built-in battery is damaged. This will only happen if the phone is somehow damaged. If the problem still occurs, they should contact the dealer for replacement parts or send them back if they still have a warranty claim.

End calls when they try to send them

It is also possible that you cannot call at all, even if you have dialed the number. It needs memory for all possible tasks, so this problem can be solved by simply clearing the memory space.

Incoming calls are automatically answered

To fix this issue, you must edit the menu button or deselect it. If you call and then you realize there is nothing they can do but talk to the person, it can be annoying.

The second reason is not tightly fitting glass near the proximity sensor. As a result, the sensor "gets" into the edge of the glass, and seeing the "obstacle" blocks the system. This situation can arise at any time, from the purchase of a phone, during its operation, and ending with a fall or shock. It was this problem that was in the Chinese replica Samsung S5. I was advised to take it to the workshop, where they would solder the crane to the body for 1000 rubles. This is exactly what my friend did, namely with the real S5 (it turns out that this model has this common problem), but they warned that after that the phone would not be presentable, but the screen would stop turning off during a call. The basis of the method is that the glass is pressed, the plastic is melted over it with a soldering iron, and the plastic, having melted, creeps onto the glass. As you understand, after that, a “scar” will remain on the phone. This method did not suit me, and I decided to try another one, which cost me 76 rubles. I just bought Super Moment. I took plastic from the packaging of Super Moment, plastic is needed in order not to absorb glue. Dropped a drop of glue on cardboard from the same package of glue. Thereafter. I touched the plastic to this drop. There is a small amount of glue left on the plastic. after that, I, with this part of the plastic, ran along the protruding rear part of the glass and pressed it. After a minute he let go and checked his phone. The phone worked fine and the screen stopped turning off during a call. All this can be seen in the video at the end of the article.

Caller screen still on

The mobile phone does not do this at other times, but when mobile data is set, it is possible that calls cannot be received. If the problem persists, you should reset it and reset it to its default state. To solve this problem, you should always check the sensor.

It may happen that it does not work correctly. Once it is restored, you will no longer have this problem. A very common problem is that echoes can be heard during a conversation. You can solve this problem in several ways. If you still have it, you must reset as well. For help, please use our forum.

Why did I do this particular algorithm? Just the laws of chemistry and physics, as well as the desire not to spoil appearance devices. If I took paper or cardboard, then the glue would be absorbed, and I would practically not apply anything. If I had dripped on the place where the glass moves away from the case, then the drop would have leaked under the glass, where it could splatter or glue the internal parts, and from above it would have spread, albeit over a small, but part of the glass. And this is a “blot”, which you cannot get rid of, respectively, the appearance is spoiled. Also, during pressing, all the excess glue would have to go somewhere, and this is only the inner part, or the upper part of the glass. In my version, the plastic from the packaging took exactly as much glue as I touched. Clay occupied the area that should have been occupied. After I began to lead, the end of the glass took only as much glue as it could accommodate the area of this glass. By analogy with water, when you supply something under a stream from a tap, and the water starts to run exactly over a given area (of course, if you have not turned on the pressure for everything). Therefore, the glass took exactly as much glue as was enough for its area, and nothing more.

Causes of problems with the proximity sensor when the screen goes blank during a call

This is the application that will manage it automatic control speaker, but this requires programming this control in the application. Once the app is installed, open it and follow the steps below. The first thing to do is activate the device's proximity sensor, which will detect if the phone is "close" to the ear or not. To do this, press the 3-dot button at the top and select "Settings". On the next screen, tap the "Monitor" block.

We will talk about the third option of a fading screen during a call in the next article, using the Xiaomi Mi4 as an example.