LG 55UH615 - Video Error: No Video;No Audio

Normal
voltage?
Check various
voltages of Power
Board ( 13V)
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
☞A18
Established
date
Revised date
2/16
Error
symptom
2
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