47LV470S (CHASSIS:LD12B) - LG TV Service Manual (repair manual). Page 43

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Normal
voltage?
Check various 
voltages of Power 
Board ( 3.5V,12V,20V 
or 24V…)
No Video/
No audio
Check and 
replace 
MAIN B/D
Y
Replace Power 
Board and repair 
parts
N
End
Standard Repair Process
A. Video error
No video/ No audio 
A4
Established
date 
Revised date 
2/14
LCD  TV
Error
symptom
2
2010. 12 .14
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