The phone can t be turned on after the black screen. The boot page is displayed all the time

Hello: According to the situation you described, it is recommended that you try the following:

1.Charge with a cable charge for a while and try to turn it on, or replace a phone battery of the same model.

2.Take out the SIM card and SD card at the same time and try to power on again.

3.If the issue persists, it may also be related to third-party software that you have installed yourself**. When you see the "Samsung" logo icon when you reboot the computer, press and hold the menu until the word "Safe Mode" appears in the lower left corner of the screen, then let go, enter the settings and uninstall some self-** applications, then turn off the computer and try to restart it.

4.If you still can't turn on the computer after uninstalling the app, you can follow the above methods to enter the "safe mode" and back up your data (for example: contacts, text messages, **, etc.) and restore the factory settings.

5.If you can't enter safe mode and can't turn it on, it is recommended that you send your phone to the nearest Samsung service center for testing and repair.

If the phone cannot be turned on, you can perform the following methods to check yourself:

1) Check whether there is a virus on your phone.

If the phone suddenly and frequently restarts, it is likely that it is a virus. You can use the mobile phone security guard to scan and disinfect the mobile phone first, and clean it up.

2) Uninstall some unnecessary software.

If there are too many mobile phone installers and too many software running at the same time, it is easy to fail to run and restart.

3) Software conflict issues.

If you think about whether you have installed or upgraded any software recently, it is often these software conflicts that cause the system to restart automatically, so you only need to uninstall the software that caused the conflict.

4) Factory reset.

If you can't be sure what software or plug-ins are causing your phone to restart frequently, you can choose to factory reset your phone and save the more important things on your phone before doing so.

5) There is a problem with the SIM card.

In addition to the internal software problems of the phone, the hardware problems of the mobile phone can also cause the phone to restart, and the SIM card error is a common hardware problem. Change a SIM card to the phone and see if there is a reboot to determine whether it is a SIM card problem.

6) Phone battery contact issues.

Poor contact of the mobile phone battery will also cause the mobile phone to automatically restart, and you can take it to the mobile phone repair office for consultation and help.

The phone is turned on but the screen is black, hello dear, 1It may be that the battery of the mobile phone is too low, resulting in the mobile phone still not responding after turning it on. Workaround:

Try connecting your phone's charger and then turning it back on. 2.It may be that the phone's system is malfunctioning, resulting in some functions of the phone not working normally.

Solution: Try updating your phone's system, or back up your phone's data and then factory reset your phone. 3.

It may be that there is some software in the phone that is not compatible with the system, which causes the phone to not work normally. Workaround: Try removing the incompatible software from your phone, or re** the latest software version.

You can contact the after-sales service of the mobile phone, and then let the professionals inspect and repair the mobile phone. I hope I can help you! If my answer is helpful to you, please give a thumbs up (comment in the lower left corner), look forward to your like, your efforts are very important to me, your support is also the motivation for my progress, and finally I wish you good health and a happy mood!

You can press and hold the power button for 15 seconds to restart the phone, if it is normal after turning on, you can try to clean up the phone's memory to ensure that the background runs smoothly.

The mobile phone is a portable terminal that can be used in a wide range, the full name is mobile**or wireless**, which was originally just a communication tool, and was commonly known as "big brother" in China in the early days.

The mobile phone was first developed from the war mobile ** machine manufactured by Bell Labs in the United States in 1940, and then the world's first commercial mobile phone was invented by Martin Cooper, an American Motorola engineer in 1973. In addition to the typical features, modern mobile phones include a camera, GPS, and Internet connection, all of which are collectively referred to as smartphones.

If the mobile phone cannot enter the system page after booting up, and the screen is stuck or frozen, it is recommended to:

1.Please press and hold the power button and the down volume button at the same time for more than 7 seconds to restart the device; If it is a mobile phone with a removable battery, please press and hold the power button for 8-10 seconds to restart the machine, if it does not work, please turn off the battery and reinsert it.

2.If the problem persists after restarting the machine, it is recommended that you bring the purchase receipt, repair card, and machine to the Samsung service center for inspection.

If the screen doesn't light up, there must be something wrong with the hardware (such as a broken data cable or light-emitting tube), and there are not many cases where the mobile phone can be repaired by itself, go to after-sales service, and now with the cheap mobile phone itself, the maintenance is relatively cheap.

It is recommended to go to the after-sales service to take a look, it may be that the cable is broken, it may be a system problem, it is best to let a professional take a look.

1. The mobile phone cannot be turned on after being turned off due to excessive discharge, or it cannot be turned on due to flashing.

Try to press and hold the power button for more than 10s first, if the phone vibrates, you can release the power button, and then connect the charger to charge for more than half an hour before turning it on.

2. The machine does not turn on due to flashing.

There are many uncertainties in the flashing process, and it is possible that the machine cannot be turned on normally after brushing. Press the power button and the volume down button at the same time on the shutdown interface, and then let go after vibrating to see if you can enter recovery mode.

Summary. If the black screen phenomenon mainly occurs after dialing **, you should focus on checking whether the front panel sensor is blocked by foreign objects, and if there is indeed a foreign body, clean it up.

What to do if your phone is on but the screen keeps black.

1.If the black screen phenomenon mainly occurs after dialing **, you should focus on checking whether the front panel sensor is blocked by a foreign body, and if there is indeed a foreign body, clean it up.

2.After the phone screen goes black, you can try to press the power off button + volume plus button for about 15 seconds, observe whether the phone limb is not forced to restart, if the phone has no response to the poor hunger, you can try again after connecting the virtual detection into the charger.

The phone can be used normally.

3.When the above two methods do not work, it means that the phone may have a hardware failure and needs to be sent to a repair center for repair.

But what about a black screen?

Voice assistants can also shout.

Follow the methods above to give it a try.

Turning off and turning on does not show anything.

Dear, there's something wrong with the hardware.

Need to go to the after-sales overhaul, dear.

Which part is the main one? It's broken.

Dear, you need to open it and check it.

How much does it cost to fix it? Please estimate the price.

Dear, you need to see what hardware is replaced to be sure.

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.

This can be solved by doing the following:

2. If the phone has a black screen of death when it is standby, you can press and hold the power button for more than 15 seconds to restart the phone, and click the left virtual button or the middle button at the bottom of the screen to clear the background program running on the phone; At the same time, it is recommended to develop a good habit of shutting down and cleaning up the system cache.

Note: If there is a breathing light function at the top of the mobile phone screen, you can plug the mobile phone into the charger, if the breathing light is on, it may be caused by the damage of the mobile phone screen or the hardware failure of the machine; If the mobile phone does not have a breathing light function, you can press and hold the power button for more than 15 seconds to determine whether the mobile phone vibrates.

3. After the above operation, it is still recommended to back up the data and try to restore the phone to factory settings;

4. If the above methods still cannot be handled, it is recommended to bring the purchase invoice and warranty card to send the mobile phone to the local service outlets for testing and processing by professional engineers.

When the mobile phone is turned on, the black screen and the brightness cannot be adjusted, which means that the screen is broken, basically due to accidental drop or collision, and you can only go to the mobile phone repair shop for testing and repair.

If the phone starts up and the screen flashes and then the black screen appears, it means that there is a problem with the phone system, you can try to press and hold the phone power button and the volume button to double clear.

Restart the phone after the phone is double-cleared, if it is useful, the phone will be turned on, if the phone is still black, you must flash the system to reinstall the system, and flash the phone to a professional mobile phone repair office.

If the screen is broken, it is mostly caused by an accidental drop, and it is also possible that the line will get into the sweat.

The phone is turned on, but the screen keeps black. This means that your phone's screen is being touched. I was touched.

In general, in this case, don't think too much, it's useless to think too much.

It's just that if it's broken, go fix it.

There are several reasons why the phone suddenly has a black screen and then it won't turn on:

1. The boot line is abnormal: use an external power supply to supply power to the mobile phone, use the electric meter to detect whether the indication has changed, if there is no change, it is likely that the boot line is broken or the boot button is not in good contact.

2. The power supply circuit of the battery is abnormal: use the external interface to supply power to the mobile phone, see if it returns to normal when it is turned on, if it is normal, it is determined that the power supply circuit of the mobile phone is abnormal.

3. The IC of the mobile phone power supply is abnormal: test the test point of the peripheral circuit of the power supply IC according to the circuit schematic diagram to see whether the test value is normal.

4. The system clock and reset of the mobile phone are abnormal: you can use the dual total oscilloscope to detect the CPU power supply of the mobile phone to check whether the waveform in the reset is correct.

5. Problems with logic circuits: that is, faults in the circuit version of mobile phones, which can generally be solved by repair welding.

6. Software conflict: The installed software does not match the system of the mobile phone, which may also cause the mobile phone to fail to boot, you can connect the mobile phone to the computer to delete the program.

What should I do if my phone can't turn on the black screen of death, the little knight teaches you to solve it with two methods.

It is recommended to use the original charger and data cable to charge for 20 minutes, and press and hold [Volume Down + Power On] for 30 seconds to try to turn on (early models long press the power button for 30 seconds to try to turn on). If the above operation cannot be turned on, please bring your mobile phone, charger and data cable to the after-sales service center for processing.

What's going on with Huawei mobile phones that can't be opened when they are black and flat.

Let's see if it's caused by the battery running out If it's a problem with the circuit board, you can only go to the maintenance point to get it.