LG 32LF550B Service Manual page 46

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