Component1 No Video/No Color Problem - LG 42SL90QD Service Manual

LCD TV
Symptom
Check Signal format g
Is it supported?
YES
Check the Component Cable
YES
Check MAIN B'D R421
Video Signal ?
NO
YES
Check MAIN B'D C200, C203 (Y)
C201 (Pb)
C202 (Pr)
Video Signal ? Video Signal ?
YES
Replace MAIN B'D IC 100
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Only for training and service purposes
Component1 No Video/
No Color Problem No Color Problem
MAIN B'D JK402 Check
NO
Replace
MAIN B'D C200 or C203 or C201 or C202
NO
Making
Revision Revision
Replace MAIN B'D JK402
2009. 2 . 1
7/25
LGE Internal Use Only