17" LCD Color Monitor
9.2 Trouble shooting
9.2.1 Main Board
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 U701 PIN2=3.3V
C702 "-"=1.8V
X401 oscillate waveforms
are normal
No power
OK
OK
NG
OK
NG
OK
Replace U401
Reinsert or check the
NG
Adapter/Inverter
section
Check CN701 or replace
U701,Q702
Replace X401
45
Dell E178FPC