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19" LCD Color Monitor AOC 919Swa
30
9.2 Trouble Shooting
9.2.1 Main Board
1. NO SCREEN APPEAR
No power
No power
Press power key and look if
the picture is normal
Please reinsert and make
sure the AC of 100-240 is
normal
Measure U404 Vout=3.3V
U405 Vout=1.8V
Reinsert or check the
power section
X401 oscillate waveforms
are normal
Replace
U404,U405,CN404
Replace U401
Replace X401
OK
OK
OK
NG
NG
NG
NG