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4. TROUBLE SHOOTING
LGE Internal Use Only
Copyright © 2008 LG Electronics. Inc. All right reserved.
Only for training and service purposes
CHECKING FLOW
START
Is the connection of
FPCB with connector on
PCB(CN400) ok ?
YES
NO
Reassemble FPCB with CN400 connector
Is Voltage pin8 of U401 2.8V?
NO
Replace U401
Check the soldering of
CN400 ?
NO
YES
YES
Check the soldering of
LCD Line ?
Resoldering CN400
NO
Resoldering R400~R422
Does LCD work
properly ?
NO
Replace LCD module
YES
LCD working well !
YES