LG OLED55B7P

No audio
Screen normal
Check user
menu >
Speaker off
Off
N
Y
Cancel OFF
Check audio B+
20V of Power
Board
Normal
voltage
Y
N
Replace Power Board and repair parts
Check
Speaker
disconnection
N
Y
connecting Speaker
Replace MAIN Board
End
C. Audio error
No audio/ Normal video
☞A11 ☞A12+A9
Disconnection
Established
date
Revised date
8/15
Error
symptom
Standard Repair Process
8