Audio Error - LG 55LW5700 Service Manual

Standard Repair Process
LCD TV
No audio
Screen normal
Copyright ⓒ 2011 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
2010. 12 .14
date
Y
N
End
ⓒ LG Electronics. Inc.2009
8/13
LGE Internal Use Only