What is the black line on Huawei's mobile phone screen?

1. There is something wrong with the display line of the mobile phone, and the display cable is in poor contact.

2. The LCD screen of mobile phone is broken. When the LCD screen is squeezed, the gap between the LCD screens will become larger, resulting in black lines.

3. The flat wire of the source drive circuit of the mobile phone LCD is welded, or the drive IC is damaged, or the peripheral circuit of the IC has a damaged or welded part.

4. The mobile phone tries to turn on or run after it is flooded, which causes the screen color line (red, blue and green) inside the mobile phone to burn out, resulting in a certain area that cannot be displayed and vertical lines are generated.

5. The tail plug line of the mobile phone display screen is broken or the battery that supplies power to the tail plug line is broken, resulting in no power supply.