Repair Redmi Note 4 Display Light Problem | LCD Backlight Ways

By Mobile Rdx Last updated Jun 12, 2021

Here is the tested and working solution of Xiaomi Redmi Note 4 Lcd Backlight not working problem display light ways and display related issues in case you are going to troubleshoot display problem such blank display, dark screen display, white screen (with tones), No backlight LED that is resulted from due to wet damaged or accidentally dropped issues by the users.

The problem of damage with no backlight is often symptomatic like an LCD that has no display, the LCD screen becomes white. Or in general, there is no light produced by the LCD screen but the ringing and notification sound can still be heard.

What Is An Redmi Note 4 LCD or Backlight?

To start with, an LCD is the digital display interface of your phone, it is the interactive part where you see what goes on as you operate or tap on an icon, watch a video, play music or games, etc. When the LCD (liquid crystal display) is faulty or damaged, you one won’t be able to enjoy it as before. This is where the LCD backlight comes in, the backlight is a series of LEDs (light-emitting diodes) well arranged and suited in the screen layers to give illumination to the LCD screen.

Redmi Note 4 LCD Backlight Problem Solution

To fix the dark screen Redmi Note 4 backlight problem, you may first try to replace or install a new Display screen module, to easily confirm if the LCD’s backlight LED’s were still working or already damaged. You can also check the LED’s using the multimeter if you can manage without damaging the LCD flex connector. If the newly installed LCD still shows the same problem and the LED light doesn’t light up, refer to the solution below and locate the highlighted components on the PCB board.

Redmi Note 4 Backlight problems that you might encounter:

White Display
No Display
Lines on Display
Low Light on Display
No Backlight

If Redmi Note 4 phone you have had one of the symptoms described above. Then can be done some repair steps that can overcome the damage.

1. Make changes to the LCD screen

The first thing to do if experiencing such damage is to try replacing the new LCD part with a good condition. This can be applied if your phone has a burst or crack on the screen from falling firmly. By trying to replace the new LCD, hopefully, this damaging problem can be solved.

2. Check the line and the LCD socket

No backlight damage to a phone can be caused by the fluid that enters the phone. And damages the line and the LCD socket on the Motherboard. So to fix it, it is recommended to uninstall all parts of the phone in order to perform the check. Usually, water will corrode and rust on the track and socket and impact the breaking path. So for the step repair immediately clean the corrosion and rust, if there is a path that broke immediately repair with the path jumper method.

3. Check and replace internal components

If the condition of the LCD and the line is in good condition, but suddenly there is backlight damage on your phone. Then it can certainly occur problems in the internal components. The diagram image that Mobilintec Team provides can be a guide for you in trying to fix the backlight damaged

Perform measurements on each component, if there is a defective component then immediately turn with components of the same type and value. Try to check the components of the diode as well as the coil that has been marked on the diagram image. Often the component is damaged and results in the appearance of the backlight display.