LG 42LN5700 - Page 70

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No audio
Screen normal
Check user
menu >
Sound Out
TV
Speaker?
Y
N
Change the TV Speaker
Check audio B+ 24V
of Power Board
Normal
voltage
Y
N
Replace Power Board and repair parts
Check Speaker
disconnection
N
Y
Replace Speaker / Cable
Replace MAIN Board End
C. Audio error
No audio/ Normal video
☞A24 ☞A25
Disconnection
Established
date
Revised date
8/13
LCD TV
Error
symptom
2012. 12 .21
Standard Repair Process
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