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Standard Repair Process
LCD TV
Copyright © 2011 LG Electronics. Inc. All rights reserved.
Only for training and service purposes
Error
symptom
☞A4
Check various
voltages of Power
No Video/
No audio
Board ( 3.5V,12V,20V
or 24V...)
A. Video error
No video/ No audio
Check and
Y
Normal
replace
voltage?
MAIN B/D
N
Replace Power
Board and repair
parts
2
Established
2010. 12 .14
date
Revised date
End
2/14
LGE Internal Use Only
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