Read LG 42LC5DC (CHASSIS:LA65A) Service Manual online
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Analog TV Video Trouble Shooting
Check RF Cable
Check CVBS signal
TU100 #9 Pin
Maybe Tuner(TU100) has
problems
Check CVBS signal
IC503 #2 Pin
Check CVBS signal
RR534
Y
Y
N
Check Tuner 5V Power
IC1102 #3 Pin
Replace it
Y
N
Y
Replace it
N
Replace it
N
Y
Maybe FI-8668(IC506) has
problems
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