LG 55LM9600 Service Manual page 78

Standard Repair Process
LCD TV
No audio
Screen normal
Copyright ⓒ 2012 LG Electronics. Inc. All right reserved.
Only for training and service purposes
C. Audio error
Error
symptom
No audio/ Normal video
☞A24
Check user
menu > Off
Speaker off
Y
Cancel OFF
Check
Speaker
disconnection
Revised date
☞A25
Check audio B+
N
Normal
24V of Power
voltage
Board
Replace Power Board and repair parts
N
Disconnection Replace MAIN Board
Y
Replace Speaker
8
Established
2012.01.16
date
Y
N
End
8/15
LGE Internal Use Only