LG OLED55B8STB

No audio
Screen normal
Check Sound menu
 Internal TV speaker
or not
Internal
TV
Speaker
Y
N
Select Internal TV Speaker
Check
audio B+ voltage(20V)
of Power Board
Normal
voltage
Y
N
Replace Power Board or repair parts
Check
Speaker cable
connection
N
Y
Connect Speaker cable
Replace Main B/D
End
C. Audio error
No audio / Normal video
☞
A13
☞
A14 & A10/A11
Disconnection
Established
date
Revised date
10/17
Error
symptom
Standard Repair Process
10
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