The mobile phone is black. What's the problem? How to solve it?

If you use a vivo phone, you can check the black screen by referring to the following methods:

1, forcibly restart the phone.

Try to restart the phone forcibly, observe whether it can be used again, and check whether the power button and volume button are stuck in the protective case.

Forced restart method:

20/KLOC-models launched before September, 2007 (models before X20): Press and hold the "power button" 12 seconds or more.

20/KLOC-models and new models (X20 and later models) launched after September 0/7: Press and hold the "power button"+"volume down button" 10 second at the same time.

NEX 3/NEX 3S: Press and hold the top round key for more than 10 second.

2. Upgrade the system version

Upgrade your phone to the latest version in the Settings-System Upgrade interface.

3. You can enter Settings-System Management-Backup and Reset-Restore All Settings-Restore and Restore Settings. This operation will not delete the media file, but will cancel the password and restore all settings, including the set wallpaper, unlocking method, WiFi, default opening program, etc. Logged-in software accounts also need to log in again.

Note: Enter Cloud Service-Device Cloud Backup-Backup Data Type-System Data-Back-Back up some backup system settings and desktop layout immediately; Cloud service-data synchronization-turn on WLAN and Bluetooth to synchronize data to cloud service.

4, service center testing

If the above methods fail to solve the problem, please back up the mobile phone data in advance, take the mobile phone and purchase voucher to the vivo customer service center for testing, enter the browser to search for official website-service-service center-view all-select provinces and cities to query the address and contact information of the local service center.