1. Confirm whether the screen is black under the following conditions.
(1) The tablet goes black when talking. In order to increase the battery life of the tablet, if the distance sensor is blocked during the call, the tablet will automatically close the screen and open the screen again after moving away.
(2) The tablet computer reaches the set sleep time. When the tablet reaches the set sleep time, it will automatically close the screen and manually open the screen when re-entering.
2. Confirm whether there is any abnormality in using the tablet while charging.
This situation will lead to overheating of the flat plate, leading to abnormality. It is recommended that you try to avoid playing with the tablet while charging.
3. Check the flat storage space
Please check the remaining storage space of the tablet. If the storage space is less than 10%, the system performance will drop sharply. It is recommended that you ensure as much storage space as possible on the tablet, and it is recommended to keep 20% of the space.
How to view it: Go to tablet settings, search for storage, and view available space and remaining space. If the remaining space is relatively small, it is recommended to open the tablet housekeeper, choose cleaning acceleration, and clean up some unused files or applications.
4. Confirm whether to run incompatible applications.
(1) Running multiple applications in the background will take up too much memory or other resources, and the tablet may be overloaded. It is recommended that you try to avoid multiple applications running at the same time.
(2) Some third-party applications are incompatible with the system, which may cause the tablet to crash and the system to get stuck, resulting in a black screen. It is recommended that you enter the application market to download the latest version of the application, and back up the data in advance (third-party communication applications need to be backed up separately) to update the tablet computer system to the latest version.
If the system keeps reporting errors and can't boot normally, you can enter safe mode, then enter tablet settings, search for application management, and uninstall the previously installed software.
Warm reminder:
Enter and exit safe mode:
EMUI 9. 1 below: Press and hold the volume button at the same time during the boot process to complete the boot. When the words Safe Mode appear in the lower left corner of the screen, it means that the mobile phone has entered;
HarmonyOS system & ampEMUI 9. 1 and above: Press and hold the power button and the volume up button at the same time during startup until the recovery mode appears, and select the safe mode;
Mate30 Pro & ampMate30 RS: Press the power button for 5 consecutive times to enter after the mobile phone starts shaking;
Restart the phone to exit safe mode.
5. Check the system version
It is recommended that you check whether the tablet system version is the latest version, go to Settings, search for software updates, and then click Check for updates. If not, it is recommended that you upgrade your system to the latest version.
Warm reminder: unofficial system will affect the stability of the tablet, leading to the abnormality of the tablet. If you have installed an unofficial system, it is recommended that you bring the purchase voucher to Huawei Customer Service Center to restore or upgrade the system.
6. Confirm whether the system files have been deleted by mistake.
When the system is running, the corresponding file can't be found, which leads to confusion and mobile phone failure. Try to restore the mobile phone system version through Huawei Tablet Assistant or eRecovery.
7. confirm whether microSD is installed.
Please check whether the problem still exists after plugging and unplugging the microSD card again. If the problem does not exist, it may be a poor contact. If the problem still exists, it may be that the microSD itself is damaged or incompatible with the mobile phone system. It is recommended to replace the high-quality microSD card.
If the problem still exists, please bring your purchase voucher to Huawei Customer Service Center for testing and handling.
Warm reminder: If the data has not been backed up before, there may be the risk of data loss when restoring and upgrading the version of the mobile phone system and testing it.