Table of Contents
Advertisement
Standard Repair Process
Error
symptom
No audio
Screen normal
C. Audio error
No audio/ Normal video
☞A20
Check user
menu >
Off
Speaker off
Y
Cancel OFF
Check
Speaker
disconnection
☞A21+A18
Check audio
N
13.2V of Power
Board
Replace Power Board and repair parts
N
Disconnection
Y
Replace Speaker
9
Established
date
Revised date
Y
Normal
voltage
N
Replace MAIN Board
End
Copyright © 2019 LG Electronics. Inc. All rights reserved.
Only for training and service purposes
9/14
Advertisement
Table of Contents
