Mi 10i 5G - LCD Backlight Case.
Troubleshoot start step by step.
1.Check graphics
ok.
2.Check New LCD same problem,only graphics.
3.Check the lighting voltage
with New LCD.
[A,K1,K2,K3] A+ abnormal and voltage missing.
4. Need PCB repair but
bad luck.
No HW solution, Bitmap, Layout No Schematic
5. Need to apply experience
6.Plug in New LCD with PCB, Use multimeter buzzer
Mood.
7. Check start LCD A signal
.
8. Find out the problem around [PM6150L]
9. Observe the area carefully
burn 
issue one
Inductor.
10.Remove the inductor carefully.
11.Check input -output Short circuit with voltage.
Everything is normal
12. Replace the same inductor, Another board from
Light sector.
13.Check output voltage A signal Ok.
14.Plug the motherboard with LCD and check it.
Alhadulillah The
comeback with New Life.
The case is closed
Game is over successfully.
Troubleshoot start step by step.
1.Check graphics
ok.2.Check New LCD same problem,only graphics.
3.Check the lighting voltage
with New LCD.[A,K1,K2,K3] A+ abnormal and voltage missing.
4. Need PCB repair but
bad luck.No HW solution, Bitmap, Layout No Schematic
5. Need to apply experience
6.Plug in New LCD with PCB, Use multimeter buzzer
Mood.
7. Check start LCD A signal
.8. Find out the problem around [PM6150L]
9. Observe the area carefully
burn issue one Inductor.
10.Remove the inductor carefully.
11.Check input -output Short circuit with voltage.
Everything is normal
12. Replace the same inductor, Another board from
Light sector.
13.Check output voltage
A signal Ok.14.Plug the motherboard with LCD and check it.
Alhadulillah The
comeback with New Life.The case is closed
Game is over successfully.