Dell E177FPc - Troubleshooting

17" LCD Color Monitor Dell E177FPc
41
8.2 Trouble shooting
No power
Measure U701 PIN2= 3.3V
U702 PIN2= 1.8V
X401 oscillating waveform is
normal
Reset signal is normal
Replace U401
Measure CN701
PIN9/10= 5V
Check U701, U702, D704
Check X401, C427, C428
Check power section
OK
OK
OK
NG
NG
NG
OK
Check R421, R422
NG
Replace U402
NG