LG OLED77C3 Series User Manual

C. Audio error
Established
date
Revised date
Error
symptom
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
No audio/ Normal video
☞A11
☞A12+A9
Disconnection
Standard Repair Process
9
Copyright © 2023 LG Electronics. Inc. All rights reserved.
Only for training and service purposes.

LG OLED77C3 Series Specifications

General

Screen Size	77 inches
Display Technology	OLED
HDR	Dolby Vision, HDR10, HLG
Smart TV Platform	webOS
HDMI Ports	4
Audio Output	40W
Voice Assistant	Google Assistant, Amazon Alexa
Refresh Rate	120 Hz
Processor	α9 Gen6 AI Processor 4K
VRR	Yes
USB Ports	3
Resolution	3840 x 2160
Bluetooth	Yes
Wi-Fi	Yes