Read LG 47SL90QD-AA (CHASSIS:LB91L) Service Manual online
Making
Revision
2009. 2 . 1
7/25
LCD TV
Symptom
Component1 No Video/
No Color Problem
No Color Problem
Check Signal format
Revision
No Color Problem
g
Is it supported?
Check the Component Cable
YES
MAIN B’D JK402 Check
Replace MAIN B’D JK402
YES
NO
Check MAIN B’D R421
Video Signal ?
NO
YES
Check MAIN B’D C200, C203 (Y)
C201 (Pb)
C202 (Pr)
Video Signal ?
Replace
MAIN B’D C200 or C203 or C201 or C202
NO
Video Signal ?
Replace MAIN B’D IC 100
YES
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