LG 55LA7400 - Audio Error; No Audio; Normal Video

- 48/83 -
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
8/13
LCD TV
Error
symptom
Standard Repair Process
2012. 11 .30
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