The phone keeps vibrating and can t be turned on, and it s a black screen

Hello dear Samsung users:

Based on your description, 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 device, press and hold the [Volume Down Button or -Menu Key] until the word "Safe Mode" appears in the lower left corner of the screen, and then let go, enter the settings and uninstall some self-** apps, then turn off the computer and try to restart it.

Comments, suggestions, complaints, please click:

The screen is black for no reason, but there is vibration, that is, the mobile phone battery is broken, you should hurry up and repair it, otherwise you are afraid of danger.

Software problems, due to system file corruption, resulting in the phone can not enter the system, in this case, you can go to the corresponding forum of the mobile phone to find the brick saving tutorial, according to the tutorial operation to try to save the brick, you can also go directly to the mobile phone brand after-sales maintenance.

1. Memory problems.

When the phone's memory is occupied too much, the phone's running speed will be slowed down, which may cause the phone to freeze or have a black screen. In the past, the memory of the mobile phone was small, and the black screen of the mobile phone was more due to memory reasons, but now, the memory of the mobile phone is as high as 128G or even 512GB, and the memory problem is no longer the main reason for the black screen of the mobile phone. However, users should also clean up the background programs in time to avoid excessive memory occupation of the phone.

2. Application software conflicts.

If the phone has a small memory and runs a lot of software at the same time, the phone may have a black screen or freeze. In the face of this problem, you can try to uninstall some software first, clear the running memory in time, if it doesn't work, you can try to save important data first, and then restore factory settings, and then ** the necessary application software.

In this case, it may be that there is a problem with the hardware of the mobile phone, and the boot self-test cannot be completed, so go to the after-sales service of the mobile phone manufacturer to check the quality of the motherboard.

The phone has a black screen for no reason but there is vibration? Dear, hello Method 1: Memory problemsWhen the mobile phone stores too many things, it will not only slow down the mobile phone running a lot, but also it is easy to go black and then automatically exit the program when running the program.

When 80% of the memory of your phone is occupied, it may freeze or black screen, but there will still be sound. Solution: Press and hold the home button of the phone to bring up the recently run program, and slide to exit; After cleaning up the garbage in [System Manager], click One-click Clean to open the background software, or click to exit one by one.

The best way is to develop a good habit of exiting the program without using it. Method 2: Contact ProblemThis question has two aspects:

The mobile phone screen is never loose, this is difficult to find, and it needs to be determined through repeated tests, which is generally caused by the loose cable of the mobile phone being dropped; The phone is damp and causes a short circuit in the cable and causes a black screen. In fact, the dampness of the mobile phone is not necessarily the water ingress of the mobile phone, and the mobile phone is used to using the mobile phone in a hot and humid environment such as a bathroom and sauna; If your hands are often sweaty or your hands are often touched with water before using your mobile phone, etc., the mobile phone may be damp and cause the waterproof sticker to turn red or even moldy on the motherboard. Solution:

Send your phone to the aftermarket for a replacement accessory. Method 3: Battery Problem: The battery life of the phone is shortened due to the battery being used for too long or the battery is over-discharged and overcharged, which in turn leads to a black screen or restart.

This can also happen if the phone battery is in poor contact with the battery connector. Solution: In addition to replacing the original battery after the sale, you can also gently wipe the connection with alcohol or an eraser (the connection part on the battery can be wiped with an eraser, and the battery connector on the mobile phone is recommended to be wiped with alcohol) to see if the problem can be solved.

Hope it helps!

Automatically power off and then charge, the battery is fully charged and turned on.

Main information:

When we press the power switch, the power supply starts to supply power to the motherboard and other devices, at this time the voltage is not stable, the control chipset on the motherboard will send and maintain a reset signal to the CPU, so that the CPU will automatically return to the initial state, but the CPU will not execute the instructions immediately at this moment.

When the chipset detects that the power supply has started to stabilize (of course, the process from unstable to stable is only a momentary thing), it removes the reset signal (if you manually press the reset button on the computer panel to restart the machine, then the chipset will remove the reset signal when you release the button).

The CPU immediately starts to execute the instruction from the address ffff0h, as can be seen from the previous introduction, this address is actually within the address range of the system BIOS, whether it is AwardBIOS or AMIBIOS, it is just a jump instruction placed here, jumping to the real boot ** in the system BIOS.

2. When the phone is turned on, the screen is black, unresponsive, or flashing red light, or the screen is turned on and turned off immediately.

1) It may be that the battery has been depleted, it is recommended that you use the standard charger to charge continuously for more than 30 minutes before trying to turn it on.

2) It is recommended that you press and hold the power button for more than 15 seconds to try to force restart your phone.

3. Boot up to enter the Harmony OS interface, EMUI interface, and Fastboot interface.

1) It may be that you have unintentionally pressed the combination of the power button + volume button to enter the special mode, it is recommended that you press and hold the power button for more than 15 seconds, try to force restart the phone, and you can enter the mobile phone desktop normally.

Note: The method of force restarting the phone on Mate40 series and MateX2 phones has been changed to press and hold the volume down button and the power button at the same time for more than 10 seconds.

2) In order to prevent you from repeating this situation in the future, it is recommended that you check whether the keys are easy to get stuck, or the protective case you are wearing has squeezed the buttons.

Hello dear, please follow the following methods to troubleshoot: 1 Force restart the phonePress and hold the power button for more than 10 seconds (EMUI version requires pressing and holding the volume down button and the power button at the same time for more than 10 seconds) to force restart the phone. If it cannot be restarted, please bring your purchase voucher to the Huawei Customer Service Center for testing.

If you can restart the recovery, we recommend that you continue to troubleshoot the problem according to the following solution to avoid getting stuck again during use. 2 Check whether there is a fault in the following scenarios: (1) The screen is black during a mobile phone call. In order to increase the battery life of the mobile phone, during the call, if the distance sensor is blocked, the mobile phone will automatically turn off the screen, and the screen will be turned on again after being far away.

2) The phone reaches the set sleep time. The screen will automatically turn off when the phone reaches the set sleep time, and manually turn on the screen when you re-enter. (3) Using the phone while charging may cause the phone to overheat, resulting in abnormality.

It is recommended that you try to avoid playing with your phone while charging. 3 Check the storage space of the mobile phonePlease check the remaining storage space of the mobile phone, if the storage space is less than 10%, the system performance will drop sharply, it is recommended that you ensure that the storage space of the mobile phone is as much as possible, it is recommended to reserve 20% of the space. How to view: