Dell E178FPC - Troubleshooting; Main Board and Display Issues

17" LCD Color Monitor Dell E178FPC
49
9.2 Trouble shooting
9.2.1 Main Board
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 U701 PIN2=3.3V
C702 “-”=1.8V
Reinsert or check the
Adapter/Inverter
section
X401 oscillate waveforms
are normal
Check CN701 or replace
U701,Q702
Replace U401
Replace X401
OK
OK
OK
NG
OK
NG
NG