Audio Error; No Audio/ Normal Video - LG 55LA7400 Service Manual
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Also See for 55LA7400:
- User manual (216 pages) ,
- Owner's manual (72 pages) ,
- Owner's manual (42 pages)
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Standard Repair Process
Error
LCD TV
symptom
No audio
Screen normal
Copyright ⓒ 2013 LG Electronics. Inc. All right 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
- 48/83 -
Established
2012. 11 .30
date
Revised date
Y
Normal
voltage
N
Replace MAIN Board
End
8/13
LGE Internal Use Only
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