Read LG 42SL8000-ZB / 42SL8500-ZA (CHASSIS:LD91K) Service Manual online
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19. AV1 No Audio Problem
Check the SCART Cable
YES
Check MAIN B’ D
C229, C230
MAIN B’ D
C229 (Right Sound)
C230 (Left Sound)
signal ?
YES
NO
Replace MAIN B’ D IC 100
AV1 Video OK ?
YES
Check MAIN B’ D JK1100
Replace MAIN B’ D JK1100
NO
YES
20. AV2 No Audio Problem
Check the SCART Cable
YES
Check MAIN B’ D
C2008, C2009
MAIN B’D
C2008 (Right Sound)
C2009 (Left Sound)
signal ?
YES
NO
Replace MAIN B’D IC 100
AV2 Video OK ?
YES
Check MAIN B’ D JK1101
Replace MAIN B’D JK1101
NO
YES
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