LG OLED55B9PTA

Normal
voltage?
Check various voltages
of Power Board (Main)
(20V, 12V…)
No Video/
No audio
Check and
replace
MAIN B/D
Y
Replace Power
Board and repair
parts
N
End
Standard Repair Process
A. Video error
No video/ No audio
☞
A9
Established
date
Revised date
2/16
Error
symptom
2
Copyright © 2019 LG Electronics. Inc. All rights reserved.
Only for training and service purposes