Read LG 26LN45XX / 26LN4500 (CHASSIS:LJ31A / LD31T) Service Manual online
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4. No Video - Component
Check input signal format
Is it supported?
Check signal
R239,R237,R241
C220,C218,C222
Replace R239,R237,R241
C220,C218,C222
Y
N
Check JK2800
Replace JK2800 or
Check Device
Y
N
Y
IC101 has problem
Y
Check Component Cable
Wave form of C220
Wave form of C218
Wave form of C222
Wave form of Comp Y
Wave form of Comp Pb
Wave form of Comp Pr
5. No Video - RGB
Check input signal format
Is it supported?
Check Hsync, Vsync
R4024, R4025
Replace R4024, R4025
Check signal RGB
R228,R230,R232
C204,C206,C208
N
Check JK400
Replace JK400 or
Check Device
Y
N
Y
Replace R228,R230,R232
C204,C206,C208
N
IC101 has problem
Y
Check RGB Cable
Wave form of R4025(Vsync)
Wave form of R4024(Hsync)
Wave form of R230/C206
Wave form of R228/C204
Wave form of R232/C208
Y
Y
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