Trouble Shooting; Main Board - HP W17q 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 U201 PIN 2=3.3V
Q202 C = 3.3V
OK
X401 oscillate waveforms are
normal
NG
OK
Replace U401
OK
Replace U501
NG
NG
Measure CN301 PIN9/10=5V?
Replace X401
29
Reinsert or check the
power section
Chec Check power section
TXD
Replace U201/Q202
HP W17q