Read LG 47SL80YD-DA (CHASSIS:LT91T) Service Manual online
Check Signal format
Is it supported?
Check the RCA Cable
YES
MAIN B’D JK402 Check
Replace MAIN B’D JK402
YES
NO
Check MAIN B’D R420
Video Signal ?
NO
YES
Check MAIN B’D C217
Video Signal ?
Replace
MAIN B’D C217
NO
Replace MAIN B’D IC 100
YES
Making
전자 - 6-2
Revision
2009. 2 . 1
LCD TV
Symptom
AV1 (CVBS) No Video
Problem
5/25
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