LG 47LW6500-UA Service Manual page 65

5. Trouble shooting - No video (Component)
Check input signal format.
Is it supported?
ok
Check Component Cable
for damage or open conductor.
ok
Check JK1105
Y/PB/PR signal Line
ok
Check COMP_DET Signal
ok
Check BCM LVDS Output
ok
Check FRC IC LVDS Output
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Only for training and service purposes
No
Replace Jack
No
Replace R1114 or R130
No
Replace BCM( IC101) or Main Board.
No
Replace FRC ICIC5201) or Main Board.
LGE Internal Use Only