37LV370S-ZB, 37LV375G-ZC, 37LV375S-ZC, 37LV375W-ZC (CHASSIS:LD12B) - LG TV Service Manual (repair manual). Page 56

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Established 
date 
Electronics 6-3
Standard Repair Process Detail Technical Manual
Revised 
date 
2008. 2 . 1
LCD TV
Error 
symptom
Power Board voltage measuring method
Content
A. Video error_
No video/No audio
5/33 - 2/13
Check each voltage output 
(3.5V, 12V, 24V) supplied 
from Power Board to Main 
Board.
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