LG OLED55CXAUA - External Control Device Setup: Command Details (Part 3); Equalizer and Energy Saving Commands; Tune Commands

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
C. Audio error
No audio/ Normal video
☞A20
☞A21+A18
Disconnection
Established
date
Revised date
Error
symptom
Standard Repair Process
9
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