6.
LCD backlight not on or dark
Solution:
Flash the handset with latest SW
Check the connect ribbon cable saddle normally or not , Re-assembly LCD.
Check the LCD connector work normally or not, Re-Solder LCD connector or change it
Check the Backlight IC work normally or not, Re-Solder Backlight IC or change it
Check the CPU work normally or not, Re-Solder CPU or change it
.
Backlight
IC
CPU
LCD
Connector
