18.5" 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 U104 PIN 2=3.3V
OK
X401 oscillate waveforms are
normal
NG
OK
Replace U401
NG
NG
Measure CN101 or U104
Replace X401
32
Reinsert or check the
power section
HP LE1851w