Read LG 47LK450 / 47LK451C (CHASSIS:LA01U) Service Manual online
Trouble shooting guide
4. AV Video
Check input signal format.
Is it supported?
Check AV Cable for damage
for damage or open conductor
When the model is LK series,
Check JK1604, JK9903
ok
ok
ok
No
Replace Jack
5. Component Video
Check input signal format.
Is it supported?
Check Component Cable
for damage or open conductor.
Check JK1601 or 1603
Y/PB/PR signal Line
- C211/213/215/217/218/220/222/224
ok
ok
ok
No
Replace Jack
ok
Check CVBS_DET Signal
Replace R9915 or R1666
No
Check Mstar LVDS Output
Replace Mstar(IC100) or Main Board.
No
Check COMP_DET Signal
Replace R1614, R4223 or R1615
No
Check Mstar LVDS Output
Replace Mstar(IC100) or Main Board.
ok
No
Check JK1604 , JK9901
CVBS Signal Line
- C227 , C405
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