ViewSonic VS11444 Service Manual page 49

6.2. No Power & Power LED Off
No power
Check primary
rectifier voltage
Check pin6 of IC802
voltage about 12V
Check pin2 of IC802
voltage about 2V
Check pin1 of IC802
voltage is below 1V
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END
Check circuit
if short
Check F801, P801,
RT,801,D801
CheckC810,D803,C807,
Check primary OVP, OLP
and secondary feedback,
Check R811, R810,
R809, R808,R814
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46
Check IC802,
C804, T801,
VX1945wm-3