Read LG 42SL90QD-SA (CHASSIS:LJ91L) Service Manual online
5. Component Video Trouble Shooting
Check Signal Format
Is it supported signal?
Y
Check Component Jack JK209 at
Jack Board
N
Y
Check Component Signal
R292, R293, R294
R295, R296, R297
R295, R296, R297
at Jack Board
N
Replace one of
R292, R293, R294, R295, R296, R297
L212, L213, L214, L215, L216, L217
& Recheck
Y
Check Component Signal
C130, C131, C132
C133, C134. C135
C133, C134. C135
N
Replace it
Y
Y
Check Component Cable
Replace Jack at Jack board
Maybe BCM3556(IC100)
has problems
Check cable between P203 at Jack
Board and P701 at Main Baord
N
Maybe Cable Pin has problems
Y
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