Read LG 42LH301C (CHASSIS:LD91A) Service Manual online
No audio
Screen normal
Check user
menu >
Speaker off
menu >
Speaker off
Off
N
Y
Cancel OFF and describe
Check audio B+
20V or 24V of
Power Board
20V or 24V of
Power Board
Normal
voltage
voltage
Y
N
Replace Power Board and repair parts
Check
Speaker
disconnection
Speaker
disconnection
N
Y
Replace Speaker
Replace MAIN Board
End
C. Audio error
No audio/ Normal video
Disconnection
Established
date
Revised date
2008. 3 .05
8/13
LCD TV
Error
symptom
Standard Repair Process
8
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