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32LW570G-ZD, 32LW570S-ZD, 32LW575S-ZC, 32LW579S-ZE - LG TV Service Manual (repair manual). Page 63

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No audio
Screen normal
Check user 
menu  > 
Speaker off
Off
N
Y
Cancel OFF 
Check audio B+ 
24V of Power 
Board
Normal
voltage
Y
N
Replace Power Board and repair parts
Check 
Speaker 
disconnection
N
Y
Replace Speaker 
Replace MAIN Board
End
C. Audio error
No audio/ Normal video  
☞A24
☞A25
Disconnection
Established
date 
Revised date 
9/14
LCD  TV
Error
symptom
Standard Repair Process
9
2010. 12 .14
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