LG OLED55C3 Series

Normal
voltage?
Check various
voltages of Power
Board (20V,12V…)
No Video/
No audio
Check and
replace
MAIN B/D
Y
Replace Power
Board and repair
parts
N
End
Standard Repair Process
No video/ No audio
☞A9
2
Established
date
Revised date
Error
symptom
A. Video error
Copyright © 2023 LG Electronics. Inc. All rights reserved.
Only for training and service purposes.