To troubleshoot the Xiaomi Redmi 9A screen losing light, you can try to replace or install a new display first to easily confirm whether the LCD backlight LED is still working or has been damaged. You can also test the LEDs using a multimeter if you can be confident without messing up the LCD's connection. If the newly installed LCD screen still shows the same problem and the LED is not lit, refer to the solution below and locate the components marked on the PCB board.
Signs Xiaomi Redmi 9A screen light error
- White screen
- Not displayed
- Low light on screen
- No backlight