What to do if Samsung A7 phone has a black screen for no reason?

The phone shows a black screen for many reasons, system issues, software conflicts. If the screen is damaged, it will be illuminated as a black screen, so it is recommended to troubleshoot and deal with the following steps:

1. Press and hold the power button and the down volume button at the same time for more than 7 seconds, and try to turn the device on and off again.

2. Connect the charger to see if there is a charging display, if there is a charging prompt, you can charge it for a while and then turn it back on.

3. If you can operate the phone after restarting or charging, uninstall the third-party plug-in program that was operated before the black screen.

4. Back up your phone data (**book, short message, multi** file, etc.), and restore factory settings.

If the problem persists, please bring the purchase invoice, repair card and machine to the service center, and the engineer will check the machine and deal with it.

First try to shut down to see if it can be restored to its original state, if not, then try to build a factory reset or flash upgrade to see if it is still black. If it still doesn't work, you have to consider whether it is a hardware problem! If it is a hardware problem, you can only go to after-sales maintenance.

Solution: Shutdown state Long press the power on button and volume + to enter recovery. Select two Wipe cleaners in Recovery mode.

Different phones have different buttons, so just test it yourself. After double wipe, the phone information is completely cleaned up, and you need to reinstall the software or something.

Solution: First, make sure that you do not have power-saving software installed. Then unlock the screen, swipe the screen from top to bottom, bring up the settings menu, and tap the gear button in the top right corner of the pop-up menu.

Then click on Settings to turn off the power saving mode, and then click on the "Display" button in the device. In the middle of the screen, click on the screen to turn off automatically, and here you can set the time to 30 seconds. If the phone screen is still black, please uninstall the installed power-saving and battery-saving Android app and then see if the phone is back to normal.

If the above methods cannot solve the problem, it is recommended to send it to the after-sales service center for maintenance.

It is recommended that you try the following operations:

One. System problem: You can remove the battery and press the power button again to turn it on.

Two. Software Conflicts:

1.It is recommended to uninstall the third-party plug-in program that operated before the black screen.

2.Back up your phone's data (**book, text message, multi-media font files, etc.) and restore it to factory settings (Settings - Privacy Reset - Factory Reset).

Three. Broken screen: It is recommended to take your phone to the nearest Samsung service center for repair.

There are many reasons for the black screen, system problems, software forest rubber conflicts. If the screen is damaged, it will be illuminated as a black screen.

We recommend that you try the following:

One. If it's a black screen all the time:

You can remove the battery and press the power button again to turn it on. If the fault persists, it is recommended to send the phone to the nearest Samsung service center for testing.

Two. If it is sometimes a black screen:

1.It is recommended to uninstall the third-party plug-in program that operated before the black screen. Hole type.

2.Back up your phone's data (**book, SMS, multi** files, etc.), and restore factory settings (Settings - Privacy Reset - Restore this trembling to factory settings).

If the problem persists, you still need to bring the purchase invoice, warranty card and machine to the Samsung service center, and the engineer will inspect the machine and deal with it.

When the phone can't be turned on, it may be that the phone battery is out of charge, and then we just need to charge the phone to turn it on.

Water may not turn on the phone, we use a hair dryer to dry the phone, dry it for a day, and then turn it on.

It is also possible that there is a problem with the phone system.

The battery is a consumable, if it is damaged or improperly used and causes the battery to be damaged prematurely, you can try to replace it with a battery and see if it can start.

When the line is intact, you can replace the normal chip, version or rewrite the software.

When the above methods fail to solve the problem, it may be that there is a problem with the internal hardware of the mobile phone, at this time, we should not blindly disassemble the phone, it is best to take it to the mobile phone repair shop to repair, so as not to add fuel to the fire.

If the phone screen is black, it is recommended that you:

1.Press and hold the power button (some machines need to press and hold the power button and the down volume button at the same time for more than 7 seconds) to restart the machine

2.Connect the charger to see if there is a charging display;

If it is invalid, please bring the purchase invoice, repair card and machine to the Samsung service center, and a professional after-sales engineer will help you test it.

Hello dear Samsung users:

Samsung knows that we will provide you with high-quality solutions and answer your questions attentively, and hope to get your satisfactory evaluation.

The appearance of a smartphone malfunction can be affected by a lot of factors. For example, third-party software conflicts, viruses, excessive cache usage, hardware and other problems will cause crashes.

It is recommended that you:1If an external SD card is inserted into the body, take it out for testing. Exclude the poor performance of the SD card caused by 2

Test the third-party software before uninstalling the crash to rule out the incompatibility of the third-party software with the phone3Back up your phone's data (**book, short message, multi** file, etc.), restore factory settings, if the fault persists, it is recommended that you bring the purchase invoice and repair card to send the phone to the nearest Samsung service center for testing and maintenance, specific services.

Samsung mobile phones can automatically restart the phone by pressing and holding the power button and the volume- button for 15 seconds.

If the phone has a black screen, it is recommended that you:1Press and hold the power button and the down volume button at the same time for more than 7 seconds to restart the machine. 2.

Connect the charger to see if there is a charging display;If it is invalid, please bring the purchase invoice, repair card and machine to the Samsung service center, and a professional after-sales engineer will help you test it.

1.The black screen of the mobile phone is one of the faults that are often encountered in the maintenance of mobile phones, and the black screen can be divided into two types: one is the black screen in use, and the other is the black screen in standby.

Here are some basic causes and solutions that cause black screens. 2.Most of the black screens in use are caused by third-party software downloaded by yourself, and this situation rarely occurs with the machine.

It can also be subdivided into two kinds: one is that the software itself has a problem, the software itself is unstable, or it does not match the mobile phone system, etc., this is very easy to solve, and it can be unloaded; The second is the conflict between software and software, which is a little more troublesome to solve, and requires a software to install and uninstall a software experiment. If you find it, uninstall it, and the problem will basically be solved.

3.Black screen in standby, let's talk about the standby principle first, straight board machine because most of them have a power-saving circuit design: the mobile phone can not detect the key trigger signal for a long time, it will automatically turn off the screen, that is, standby, when you need to use the mobile phone, a button will activate the power-saving circuit, and then the screen lights up.

4.The reason for the black screen is often reflected by the delay in the triggering circuit of the screen. That is to say, the mobile phone system has issued a command to light up the screen, but because the circuit is delayed, the screen is not successfully lit, but the mobile phone system thinks it has been lit, so it causes a black screen.