LGE Internal Use Only
Copyright © 2007 LG Electronics. Inc. All right reserved.
Only for training and service purposes
4. TROUBLE SHOOTING
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4.12 Main LCD Troubleshooting
Main LCD control signals are generated by MSM6280. The signal path is :
MSM6280
→
CN833+CN4(80pin Con)
→
CN5+CN3(40pin Con.)
→
CN2 (LCD zip Con.)
→
LCD
Module
Start
GO to power on trouble shooting
Key LED is on?
Yes
NO
Press END key
Disconnect and reconnect
The LCD connector(80pin Con)
END
LCD display OK?
No
Yes
Change the Main board
Yes
Disconnect and reconnect
The LCD connector(40pin Con)
Yes
Disconnect and reconnect
The LCD connector (LCD zip Con.)
Yes