LG 49SM5KD Service Manual page 20

Standard Repair Process
Error
Monitor Signage
symptom
No audio
Screen normal
C. Audio error
No audio/ Normal video
☞A13
Check user
menu > Off
Speaker Out
Y
Cancel OFF
Check Speaker
disconnection
☞A14
N Check 13.2V of
Power Board
(Pin no. 7/8
Replace Power Board and repair parts
N
Disconnection
Y
Replace Speaker
6
Established
date
Revised date
Y
Normal
voltage
N
Replace MAIN Board
End
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