LG 42lk530 Service Manual page 55

4. Trouble shooting - No video (AV)
Check input signal format.
Is it supported?
Check AV Cable for damage
for damage or open conductor
Check JK1105 , JK1102 CVBS Signal Line
Rear AV : R1140
Side AV : R1136
Check CVBS_DET Signal
• Rear AV Detect : R1129
• Side AV Detect : R1113
Check BCM LVDS Output
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Only for training and service purposes
ok
ok
No
ok
No
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No
Replace Jack
Replace R1129 or R1113
Replace LGE35230( IC101)
or Main Board.
LGE Internal Use Only