Lcd Troubleshooting - LG KB770 Service Manual

4. TROUBLE SHOOTING

4.15 LCD Troubleshooting

LCD control signals are generated by MSM6280. The signal path is :
MSM6280 CN401
Start
Press END key
Key LED is on?
Disconnect and reconnect
The LCD connector(CN401)
LCD display OK?
Change the LCD module
LCD display OK?
Change the Main board
LCD display OK?
Change the LCD FPCB
LGE Internal Use Only
LCD Module
NO
GO to power on trouble shooting
Yes
Yes
END
No
Yes
END
No
Yes
END
No
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