LG 37LV470S Service Manual page 50

Standard Repair Process
LCD TV
No audio
Screen normal
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Only for training and service purposes
C. Audio error
Error
symptom
No audio/ Normal video
☞A24
Check user
menu > Off
Speaker off
Cancel OFF
Check
Speaker
disconnection
☞A25
Check audio B+
N
24V of Power
Board
Y
Replace Power Board and repair parts
N
Disconnection
Y
Replace Speaker
9
Established
2010. 12 .14
date
Revised date
Y
Normal
voltage
N
Replace MAIN Board End
9/14
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