Lanix LX700B - Trouble Shooting

17"& 19” LCD Color Monitor LANIX LX700B&LX900B
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8.2 Trouble Shooting
8.2.1 Main Board
(1). 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
Reinsert or check the
Adapter/Inverter section
X401 oscillate waveforms
are normal
Check U404, Q409 and Q410
Replace U401
Replace X401
OK
OK
OK
NG
NG
NG
NG
Measure U404 PIN2=3.3V
Q409 V
collector
=1.8V