LG OLED77G3 Series - Page 35

C. Audio error
No audio / Normal video
9/18
Standard Repair Process
9
Error
symptom
Established
date
Revised date
No audio
Screen normal
Check user
menu >
Speaker off
Off
N
Y
Cancel OFF
Check audio 20V
of Power Board
Normal
voltage
Y
N
Replace Power Board and repair parts
Check Speaker
disconnection
N
Y
Replace Speaker
Replace MAIN Board
End
☞A11
☞A9+A12
Disconnection
Copyright © 2023 LG Electronics Inc. All rights reserved.
Only for training and service purposes.