Read LG 50PM6700-TK (CHASSIS:PA22A) Service Manual online
Check Signal Format
Is it supported signal?
Y
Check Component JK501 or
JK503
N
Y
Check Component Signal
R507/R520/R523 or
R532/R534/R550
N
Y
Check Component Signal
C224/C223/C219 or
C214/C212/C216
N
Replace it
Y
Y
Check Component Cable
Replace Jack
Maybe MTK5369(IC100)
has problems
5. Component Video Trouble Shooting
Replace one of
R507/R520/R523
& Recheck
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