LG 50PG30 Service Manual page 27

AV Video Trouble Shooting
C948 (Composite), C991 / C992 (S-Video) (Rear)
C111 (Composite), C109 / C110 (S-Video) (Rear)
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Only for training and service purposes
TROUBLE SHOOTING GUIDE
Check signal format
Is it supported?
Y
Check AV Cable / S-Video Cable
Y
Check JK601 (Rear)
Check JK604 (Side)
Y
Check signal
C949 (Composite)
Y
Check signal
C174 (Composite) (Side)
Y
Maybe Mstar(IC100) has problems
N
Replace connector
N
N
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Replace it.
Replace it
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