LG 65UJ6300 - External Control Interface Connections; USB to Serial Converter Connection; RS-232 C Cable Connection

Normal
voltage?
Check voltage 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
2/17
Error
symptom
2
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