LG KU950 - Main LCD Trouble

4. TROUBLE SHOOTING
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4.13 Main LCD trouble
Main LCD control signals are generated by MSM6275. Those signal’s path are :
MSM6275 → U403(TCC7820 MMC) → CN801 → Wire Ass’y → LCD PCB connector
→ LCD PCB & Module
The LCD works
START
Press END key
to turn the power on
Is the circuit powered?
Follow the Power ON
trouble shooting
LCD display OK?
Change LCD Module
No
Yes
Yes
Yes
No
Yes
No
LCD display OK?
Disconnect and reconnect
the LCD Wire A'ssy
And check the LCD connector
Change Wire A'ssy
LCD display OK?
No
Change LCD PCB
LCD display OK?
Change Main Board
Yes
No
No
End