LG 49SM5KE Service Manual page 20

Standard Repair Process
Established
C. Audio error
Error
date
Monitor Signage
symptom
Revised date
No audio/ Normal video 6/11
☞A13 ☞A14
Check user N Check 13.2V of Y
No audio
Normal
menu > Off Power Board
Screen normal
voltage
Speaker Out (Pin no. 7/8
Y N
Cancel OFF Replace Power Board and repair parts
N
Check Speaker
Replace MAIN Board
Disconnection End
disconnection
Y
Replace Speaker
6
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