LG 49UB850T - Function Error; Remote Control & Local Switch Checking

C. Audio error
No audio/ Normal video
Established
date
Revised date
8/16
LCD TV
Error
symptom
Standard Repair Process
2013.01.31
No
audio/
Normal
video
Revised
date
8/16
No audio
Screen normal
Check user
menu >
Speaker off
Off
N
Check audio B+
24V of Power
Board
Normal
voltage
Y
☞A20 ☞A21+A18
Speaker
off
Y
Cancel OFF
Board
N
Replace Power Board and repair parts
Check
Speaker
N
Replace MAIN Board
EndDisconnection
disconnection
Y
Replace Speaker
8
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