LG OLED77B3 Series - A. Video error (No video; No audio)

Established
date
Revised date
Error
symptom
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
No video/ No audio
☞A9
2
A. Video error
2/16
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