Read LG 47LH9000 (CHASSIS:LD91I) Service Manual online
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Check Signal format
Is it supported?
Check the CVBS Cable
YES
MAIN B'D JK402 Check
Replace MAIN B'D JK402
YES
NO
Check MAIN B'D R400
Video Signal ?
NO
YES
Check MAIN B'D C217
Video Signal ?
Replace MAIN B'D C217.
NO
Replace MAIN B'D IC 100
YES
8. AV3(CVBS) No Video Problem
Check Spec (Refer to User Manual)
Is it supported?
Check the SCART Cable
YES
Check the Trouble Shooting Guide
Analog TV No video
YES
Check MAIN B’D R1182
Video Signal ?
NO
Check MAIN B’D C1107
Video Signal ?
NO
MAIN B’D JK1100 Check
YES
9. AV1 No Video Out Problem
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