LG OLED55B7P

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
2/15
Error
symptom
2