No Video/ No Audio - LG 42SL90QD Service Manual

Standard Repair Process
Error
LCD TV
symptom
No Video/
No audio No audio
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Only for training and service purposes
A. Video error

No video/ No audio

☞A5
Check various
Normal
voltages of Power
voltage?
Board ( 5V,12V,20V ( , ,
or 24V...)
N
Replace Power
Board and repair
parts t
Established
date
Revised date
Check and
Y
replace
MAIN B/D MAIN B/D
End
2
2008. 3 .26
2/13
LGE Internal Use Only