No Video/ No Audio - LG 42LB5800 Service Manual

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

No video/ No audio

☞A4
Check various voltages C
Normal
of Power Board
voltage?
( 3.5V,12V or 24V...)
Replace Power
Board and repair
parts
Established
Revised date
Check and
Y
replace
MAIN B/D
N
4 / 97
2014. 1 .2 2014 1 2
date d t
End
2/13
LGE Internal Use Only