LG 42LB55 series - Audio Error; No Audio; Normal Video

No audio
Screen normal
Check user
menu 
Speaker off
N
Y
Cancel OFF
Check audio B+
24V of Power
Board
Y
N
Replace Power Board and repair parts
Check
Speaker
disconnection
N
Y
Replace Speaker
Replace MAIN Board
C. Audio error
No audio/ Normal video
☞A15 ☞A16
Established
date
Revised date
9/14
LCD TV
Error
symptom
Standard Repair Process
2012. 01 .14
End
Normal
Voltage
Off
Disconn
ection
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