If on Android the screen does not turn on after a call or does not go out during a call when you bring it to your ear, then you should look for the cause of the problem in work. If it breaks, the device cannot correctly determine the position in space, so the screen does not light up, but the phone works.

This article is suitable for all brands that produce phones on Android 9/8/7/6: Samsung, HTC, Lenovo, LG, Sony, ZTE, Huawei, Meizu, Fly, Alcatel, Xiaomi, Nokia and others. We are not responsible for your actions.

Screen issues when calling on Android

main function proximity sensor is automatic switch on and turn off the backlight during a call. This saves battery power and prevents accidental ear or cheek pressure on the touch screen your gadget.

If your Android device does not turn off during a call, or the screen does not turn on after the call is over, then you should look for a problem in the operation of the sensor. The reasons may be as follows:

• Poor visibility (covered / covered with a protective film or cover).
• a lack of random access memory.
• Firmware issues.
• Moisture ingress.
• Mechanical impact and damage to the cable or other components.

Wipe the screen thoroughly before attempting software troubleshooting. Pay special attention to the upper part, where the proximity sensor is located. If a film or glass is pasted on the display, then over time they can lose their transparency and also interfere with the sensor.

Then check the call settings - perhaps the parameters are incorrectly set in them, and the sensor is simply turned off. This option is not available in all phones, but it's worth checking.

1. Open the settings and go to the "My devices" or "Settings" section.
2. On the Calls tab, make sure there is a check mark next to Proximity Sensor.

Increase

Also, make sure that the system has enough RAM for the sensor to work. Open the list of applications in the settings and on the "Running" tab, see how much RAM the phone spends. If you find a shortage, complete the work unnecessary applications.

If everything is set correctly in the settings, but the sensor does not work, do backup important data and reset your Android to factory settings. If the problem persists even after a hard reset, then you will have to flash the phone. If no software methods, including flashing, have resolved the problem, it is recommended to contact service center for diagnosing hardware problems.

Screen problems on Android after sleep mode

Another problem that may occur with the screen is that it does not turn on after sleep mode. It may or may not be black, but the phone works. If you are faced with such a situation, then know that the reasons can also be software and hardware in nature:

• Lack of RAM.
• Firmware issues.
• Incorrect operation of the power button.
• Mechanical impact (shock, fall).
• Moisture ingress into the case.

If the phone does not turn on but vibrates when incoming call or other actions, then it is likely that the problem can be fixed without contacting the service center. Clean up RAM from unnecessary processes by shutting down unnecessary ones in this moment applications. If this does not help, back up important data and reset the system settings to the factory state.

Increase

If a hard reset also did not fix the problem, you will have to flash the device. It is important not to forget to make a backup copy before any major operation to interfere with Android.

Constantly active backlighting during a call leads to many related problems: the battery starts to discharge quickly, extraneous buttons are pressed, and during the call there is no way to drop the call in time.

When the screen does not turn off when the iPhone is talking, you should immediately determine the cause of the breakdown and eliminate it, otherwise the phone may heat up excessively.

Causes of the problem

The type of repair (hardware or software) depends on the cause of the backlight problem. Let's take a closer look at why the iPhone screen does not turn off during a conversation. There are the following cases that could provoke a breakdown:

• Phone drops. Even if the phone fell only once and no visible damage is visible, this does not mean that they did not appear inside the case. Also, any deformation of the case can cause a malfunction of the physical parts of the device;
• A protective screen or film provokes unstable operation of the sensor. All these additional screens are made from various materials and some of them can interfere with the sensor to recognize movements. Remove the film or cover and wipe the proximity sensor with a dry, clean cloth to adjust its functionality. In the future, purchase body protectors made of better and thinner materials;
• Poor repair. You may have recently changed your camera or housing. As a result of unprofessional actions of the master, the light filter could be damaged or the replaced part was a fake;
• The ingress of a large amount of moisture into the phone and the formation of condensation on parts. In this case, you should dry the iPhone, leaving it disassembled for a day.

Reset

In practice, there are cases when the locked screen in the iPhone does not turn off after SMS or system notification. In this case, you should simply reset the phone to factory settings. After the reboot, the device will work normally. To avoid losing user data, back up to iTunes or iCloud in advance.

Replacing the proximity sensor

The proximity sensor is a component built into the iPhone that allows you to automatically detect the proximity of the user to the device during a call. When you bring the phone to your ear, the sensor automatically detects this action and the backlight goes out so that no other keys are pressed. A broken sensor may not recognize movements at all or determine them only once.

If the software solutions do not solve the problem, you should replace the sensor with a new part. Note that the original proximity sensor must have a special UV filter (its presence is indicated by a light pink coating on the sensor). Pay attention to this feature when buying original components:

The location of the proximity sensor is shown in the figure below:

The sensor cannot be purchased separately. If the screen does not turn off when talking to the iPhone, you should replace it front camera. Its hardware configuration contains a proximity sensor.

The repair is that you need to disconnect the display module from the back of the case. Then unscrew the cover of the front camera:

Perhaps dust or dirt just got into the sensor, so its operation failed. If this is the case, clean the part with a dry cotton swab. If there is no contamination and the sensor does not work, continue the repair.

The next step is to detach the camera with a spudger and tweezers and replace it with a new part. This way you will get an updated motion sensor.

You can find any instructions for self-repair of Iphone on our website, or call a specialist for to any place convenient for you.

Have you noticed that the screen does not turn off when talking on the iPhone (4, 5, 5s, 6, 6s)? An immediate solution to the problem is required. But first you need to figure out why this happened and what to do next. Remember the latest events that happened with the gadget. There may be an answer to the question.

Diagnosis and causes

When you notice for the first time that the backlight does not turn off, you need to take action. There are several reasons for the breakdown of the device, which are identified independently.

Important: iPhone is a complex mechanism where everything is interconnected. If you doubt your abilities, then entrust the diagnosis to a professional. This will prevent possible extra costs for the purchase of a new device.

The main causes of the malfunction:

• fall from a height or other mechanical impact;
• moisture ingress into the device;
• software failure;
• poor assembly or factory defect.

Tip: if the iPhone is under warranty, then take it to representatives Apple for an examination. All repair costs are covered under warranty.

The first steps of self-repair

If you are confident in your abilities, try to fix the problem yourself. To do this, follow these steps:

1. Reboot your device. Hold down the "Power" + "Home" buttons. Perhaps there was a glitch in the system that will go away with the restart.
2. Check for film or protective glass on the front side. Perhaps it is they who prevent the light sensor from working correctly. Carefully remove them and check if the backlight goes out.
3. Rollback device to previous version. This method is designed to fix serious failures within the system. Watch after the update for the gadget. If the failure is fixed, then update the device to latest version again according to the manufacturer's instructions.

Tip: for the correct implementation of any manipulations, call our service center in St. Petersburg, where experts will advise you free of charge.

Appeal to professionals

If the tricks above did not help and the screen does not go out when talking on the iPhone, then immediately contact a specialist. iPhone repair service in St. Petersburg can be ordered from us at an affordable price.

Our SC is equipped with high-tech equipment designed to perform repairs of any complexity. Having received permission to repair, the master will carry out the following manipulations:

• diagnose the device;
• establish the exact cause of the breakdown;
• repair the device
• tell you how to avoid similar problems in the future;
• issue a warranty card and receipt.

Note: ifThe screen does not turn off when talking on iPhone (4, 5, 5s, 6, 6s), then it may be necessary to replace the light sensor, which is carried out with a complete disassembly of the “mobile phone”. Only a master of his craft can carry out such manipulations.

Call us right now and we will quickly and reliably repair your gadget.

The reliability of the technology of the famous Apple brand has long been an indicator for other manufacturers, however, even the most reliable device sometimes fails. Quite often, owners of apple smartphones ask the question: why does the iPhone screen not turn off during a conversation?

At first glance, a harmless malfunction brings quite a lot of inconvenience - at least the included display interferes with the normal use of the device. Secondly, an unlocked phone drains the battery much faster, which will have to be recharged once again. In addition, the included display allows spontaneous launch of applications or disconnection of a call.

What can cause such a breakdown?

In most cases, the iPhone does not turn off the screen from mechanical damage, for example, after a fall or impact. The second most common reason is moisture ingress. Although latest models devices are quite well protected, sometimes for failures it is enough to simply talk in the rain. The third option is a poor-quality repair - when replacing the touchscreen or display, or a non-working proximity sensor that is triggered when the phone is brought to the ear. Often, an inexperienced repairman is not even aware of its presence, so the device reacts in an incomprehensible way.

What can you do about the problem yourself?

The first one-stop solution hard reset, i.e. resetting the device to factory settings. This will not harm the device, but it is possible with a high degree of probability to establish whether the problem is related to software failures, or is it still physical damage. If rebooting, resetting and restoring did not help, most likely the problem is still in the sensor - replacing it yourself is strongly not recommended. It is much easier to take the device to a professional service, where it will be checked and repaired.

Another option is when the display does not go out after the arrival of messages and notifications. In this case, the procedure is quite simple: first of all, you need to check if auto-blocking is set in the main settings. If it is still turned off, set the required interval after which the screen will go out (usually a minute). Naturally, a reset and restore can help (although it will take some time). If you do not want to mess with this process, you can try to remember which applications have been installed recently and remove them one by one - it may also work.

If the screen turns off intermittently while using the computer, then the cause of this problem does not always lie with the display itself. It can be related to the video card, connection cable, RAM operation, etc. There are many reasons, and this article is devoted to the main ones.

Always-on display problems are among the most difficult. Diagnose and identify the cause at home ordinary user very problematic. Such violations are associated with either hardware or software malfunctions. The former, as a rule, require contacting a service center, and the latter can be learned by studying this article.

Reason 1: Monitor failure

If the monitor turns off while the system unit is running, then problems with the main output device cannot be ruled out. Most monitors have protection that is triggered automatically when overheating occurs. But standard means device temperature cannot be checked. Therefore, here we can only advise you to check it by touch. If the display case is too hot, place it away from a wall or somewhere with better air circulation.

Excessive humidity is one of the reasons why the display turns off intermittently. Move the monitor to a room where there is no high humidity and let it stand for a while. The monitor should not be connected to the network. And if corrosion has not yet had time to form, then after the evaporation of all moisture, the device should return to normal functioning.

Disconnect the output device from the system unit. On the screen, you should see an inscription like “No signal” or “No connection”. If there is no such message, then you need to contact the service center.

To remove the monitor from the circle of potential causes of the problem, you just need to connect another output device to a stationary PC or laptop. If the image is still missing, then the fault lies with the video card or cable.

Reason 2: Cable defect

The most common reason for an output device to turn off intermittently is a damaged cable. The most commonly used connectors for screen output are DVI, HDMI. But the VGA format is still found. Make sure that the inserted cable is held securely and twisted on both sides (DVI).

• First you need to try connecting the display to another computer using the existing cable. If there is no change, just replace the cable.
• If changing the cable does not solve the problem, then the problem is with the monitor itself.
• If the problem goes away after connecting to another computer, then the problem is neither with the display nor with the cable. In this case, the cause should be sought in the depths of the system unit.

Reason 3: Video card failure

Another logical reason for constantly turning off the monitor screen may be a hardware failure of the graphics adapter. Such cases are characterized by the following:

For information on what to do in such cases, read the link below:

Reason 4: Video card overheating

In all modern PCs (including laptops), motherboards have two graphics adapters at once: internal and external. In the default settings, preference is given to the video card that is considered more productive (usually discrete). Therefore, it is necessary to monitor the temperature of the external graphics module.

In most cases, the normal operating temperature for a graphics adapter is one that does not exceed 60 degrees Celsius. But on powerful video cards, this is almost impossible to achieve. The maximum peak (100% load) is usually set at 85 degrees. For individual GPUs, the peak maximum reaches 95 degrees.

For almost all existing GPUs, the maximum allowed upper limit is 105 degrees. After that, the graphics module of the board reduces the frequency for cooling purposes. But such a measure may not work and then the PC restarts.

The first step is to make sure that the video card is not being cooled properly. For this, there are, for example, software temperature monitoring. Let's consider two of them.

Method 1: GPU-Z

Method 2: Speccy

Consider the main reasons leading to insufficient cooling of the graphics adapter.

Dust

If PC for a long time not cleaned from dust, then it's time to start it. There is a possibility that dust inside the system unit or on the video card cooler itself does not allow the latter to cool normally. Dirt and dust on the card's cooler itself can cause it to stop in severe cases. Dust removal does not require special skills: you need to disassemble system unit or open the laptop case, then use a vacuum cleaner or soft brush. It is recommended to carry out such cleaning at least 2 times a year.

Design features of the laptop

Some laptop manufacturers already at the design stage of a certain model do not think over a reliable heat dissipation system. In such cases, laptop computers there are, for example, very small grilles on the case, which logically leads to constant overheating of the entire device. Here you should take care to place any stand on the back (or front) under the laptop, lifting it up.

Alternatively, you can use special cooling pads for laptops. They allow you to more intensively drive air through the computer. There are models powered by USB, as well as having their own battery.

Loss of thermal paste properties

Heat transfer between the GPU and the cooler is carried out through a special intermediary - thermal paste (or thermal interface). Over time, the substance loses its properties, which leads to insufficient cooling of the graphics adapter. In this case, the thermal paste must be replaced immediately.

Note: Disassembling the video adapter will void the warranty if it is not covered. Therefore, you should contact the official service center. If a guarantee period already behind, read the link below for a guide to replacing the thermal interface for a graphics card.

Reason 5: Power saving mode

In the Windows operating system of all versions, there is a special service that disables currently unused devices. The purpose of this feature is to save energy. By default in the OS, idle time is never below 5 minutes if it is desktop computer or laptop. But various erroneous manipulations of the user himself or third party programs can change this time to a shorter one.

Windows 8-10

Windows 7

Windows XP

Reason 6: Video card driver

Incorrect operation of graphics adapter drivers does not often lead to the problems considered. But it is not worth completely excluding the influence of a driver conflict (or lack thereof) on the unstable operation of the display.

1. We boot the computer into "Safe Mode".

Read more: How to login Safe mode" , on the ,

2. Click "Win" + "R".
3. Next, enter "devmgmt.msc".



4. We find a discrete card (if any) in the section "Video adapters". No yellow badges exclamation mark next to the device name should not be.



5. Using RMB, click on the name of the adapter, then select "Properties".



6. In field "Device Status" normal operation should be specified.



7. Next, go to the tab "Resources" and make sure there are no conflicts.

If the device is displayed with problems (presence of additional icons, resource conflicts, etc.), then the adapter driver should be uninstalled. To do this, do the following:

This method is effective for problems with video adapter drivers. But unfortunately, it does not always bring results. In difficult cases, the user will be required to search for and install the driver manually. For information on how to do this, read the links below.

Tip: First of all, you should find and install drivers for motherboard(if you don't have them installed), then all the rest. This is especially true for laptop owners.

Reason 7: RAM

One of the most common reasons for a monitor to turn itself off is a malfunction of the RAM. To detect such problems, there are special tools for checking RAM for errors. Even if a malfunction occurs in a single module, this is enough to periodically turn off the monitor while the PC is running.

RAM modules are unrepairable, so if you find problems in their work, you should purchase new ones.

Method 2: System RAM Checker

Another way to check the RAM does not require additional software. The OS itself has a special tool.

To run RAM diagnostics using the operating system itself Windows systems necessary:

Thus, in order to determine the cause of the inoperability of the monitor, the user will need to perform a number of steps. Some of these activities are related to simple and effective diagnosis by exclusion. For example, hardware problems related to the display and cable are so easily identified. Software methods require a sufficiently long time, but they cannot be dispensed with to exclude a malfunction of the RAM.