19" LCD Color Monitor

No picture (LED orange)

No picture

Measure U404 Vout=3.3V

U405 Vout=1.8V

NG

OK

X401 oscillate waveforms are normal

NG

OK

Check if the sync signal from computer is output and video cable is connected normally

NG

OK

Replace U401

AOC 919Swa

Replace

U404,U405,CN404

Replace X401

Input the sync signal of computer, or change the cable

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Image 31
AOC 919SWA manual No picture LED orange