Main Lcd Troubleshooting - LG CU400 Service Manual

4.13 Main LCD Troubleshooting

Main LCD control signals are generated by MSM6280. The signal path is :
MSM6280 → C0N500 → CN102 → LCD Module
Disconnect and reconnect
The LCD connector(CN500)
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Only for training and service purposes
Start
Press END key
NO
Key LED is on?
Yes
Yes
LCD display OK?
No
Change the LCD module
Yes
LCD display OK?
No
Change the Main board
Yes
LCD display OK?
No
Change the LCD FPCB
4. TROUBLE SHOOTING
GO to power on trouble shooting
END
END
END
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