The problem of failure without backlight usually has symptoms such as LCD screen no display, LCD screen is white. Or in general, there is no light produced by the LCD screen, but ringing and notification sounds can still be heard.
1. LCD screen replacement
If your Xiaomi Redmi 9A phone is experiencing one of the symptoms as described above. There are a few steps you can take to fix the problem.
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| Xiaomi Redmi 9A Backlight Problem |
1. LCD screen replacement
The first thing to do if you encounter such damage is to try to replace the LCD unit with a new one in good condition. This can be applied if your phone has broken or cracked screen due to a certain drop. By trying to replace the LCD screen with a new one, hopefully this damaged problem can be solved.
2. Check the path and connect LCD
Xiaomi Redmi 9A Backlight Problem due to liquid entering the phone and damaging the transmission or LCD connet on the motherboard. To fix it, you should remove all parts of the phone to conduct a check. Normally, water will corrode and rust on the path or connection and affect the light circuit. Immediately clean up corrosion and rust, if there is a broken line, repair it by fishing method.
3. Check and replace internal components
If the condition of the LCD screen and transmission is good but suddenly there is damage to the backlight on your phone, it could definitely be a problem with the internal components. The schematic image that VietNamGSM provides can be a guide to you in trying to repair a broken backlight.
Measure on each component, if there is a defective component, replace it with a component of the same type and value. Try to check the components of the diode as well as the coil marked on the schematic image. Often the component is damaged and leads to a loss of screen light.
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Xiaomi
