LG 60PB5600 Service Manual page 39

7. AV Video Trouble Shooting
Check Signal Format
Is it supported signal?
Y
Check AV Cable
Y
Check Jack JK202/JK208
Y
Check CVBS Signal
R234,R230,R251,425,426
Y
Check Video GND(V COM)
C413, R481
Y
Maybe Mstar IC400
has problems
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Only for training and service purposes
N
Replace Jack
N
Replace one of
Resister
& Recheck
N
Replace one of
VCOM& Recheck
LGE Internal Use Only