Trouble Shooting; Main Board - AOC HP VP17 Service Manual

17" LCD Color Monitor

9.2 Trouble Shooting

9.2.1 Main Board

1、No power
No power
Press power key and look if the
picture is normal
NG
Please reinsert and make sure the
AC of 100-240 is normal
OK
Measure U701 PIN2=3.3V
U702 PIN2=1.8V
OK
X201 oscillate waveforms are
normal
NG
OK
Replace U401
NG
NG
Measure CN401 PIN3/4=5V?
Replace X201
32
Reinsert or check the
power section
NG
Check power section Check power section
Replace U702,U701
HP VP17