Main Lcd Trouble - LG U8500 Service Manual

4. TROUBLE SHOOTING

4.13 Main LCD Trouble

Main LCD control signals are generated by MSM6250. Those signal's path are :
MSM6250 -> MAIN B'd -> CN600 -> LCD FPCB and LCD Module
START
Press END key
to turn the power on
Is the circuit powered?
Yes
Disconnect and reconnect
the LCD Connector
And check the LCD connector
LCD display OK?
No
Change LCD Module
LCD display OK?
No
Change LCD FPCB
LCD display OK?
No
Change Main Board
- 104 -
No
Follow the Power ON
trouble shooting
Yes
Yes
Yes
The LCD works