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LG 47LM620S Service Manual page 93

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Standard Repair Process
Error
LCD TV
symptom
No audio
Screen normal
Copyright © 2012 LG Electronics. Inc. All rights reserved.
Only for training and service purposes
C. Audio error
No audio/ Normal video
☞A24
Check user
menu >
Off
Speaker off
Y
Cancel OFF
Check Speaker
disconnection
☞A25
Check audio B+ 24V
N
of Power Board
Replace Power Board and repair parts
N
Disconnection
Y
Replace Speaker
Established
2010. 12 .14
date
Revised date
Y
Normal
voltage
N
Replace MAIN Board
End
8/13
LGE Internal Use Only

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