Read LG 60LS5700 / 60LS5750 / 60LS579C (CHASSIS:LA22E) Service Manual online
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4. AV Video
5. Component Video
Check input signal format.
Is it supported?
Check AV Cable for damage
for damage or open conductor
Check JK3800
CVBS Signal Line
R341
ok
ok
ok
No
Replace Jack
ok
Check CVBS_DET Signal
Replace R3801
No
Check Mstar LVDS Output
Replace LGE2112(IC105) or Main Board.
No
Check input signal format.
Is it supported?
Check Component Cable
for damage or open conductor.
Check JK3801
Y/PB/PR signal Line
ok
ok
ok
No
Replace Jack
Check COMP_DET Signal
Replace R3806
No
Check Mstar LVDS Output
Replace LGE2112(IC105) or Main Board.
ok
No
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