What should I do if my mobile phone drops a black screen? Can boot normally, can receive information, but the screen is not bright.

The screen of the mobile phone is not bright. Maybe your mobile phone is broken, or the hardware-related components are loose, which affects the normal work of the screen and leads to a black screen. It may also be that there is something wrong with the software-related startup program. You can try to solve this problem by refreshing your phone, and press and hold the power-on button and the volume reduction button for a few seconds to enter the refresh mode. Select the English option to restore factory settings and restart after completion, or select the English option to swipe your card, provided that you download the corresponding card package guide.