LG 42PW340 Service Manual page 52

5. Component Video Trouble Shooting
Check Signal Format
Is it supported signal?
Y
Check Component Cable
Y
Check Component Jack JK1000
Y
Check Component Signal
R1074/R1073/R1076
R1001/R1004/R1067
Y
Check Component Signal
R173/R175/R177
R180/R182/R184
Y
Maybe Mstar S7R(IC101)
has problems
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Only for training and service purposes
N
Replace Jack
Replace one of
N
R1074/R1073/R1076
R1001/R1004/R1067
& Recheck
N
Replace it
LGE Internal Use Only