HP LP2275w

22" LCD Color Monitor HP LP2275w
44
No picture (LED orange)
No picture
The button if
under control
X401 oscillate
waveform is normal
Replace U401
Replace X401
Measure U701&U707 PIN2=3.3V
U702=2.5V U708 PIN5,6=1.8V
Check Correspondent
component
Replace U401
X401 oscillate
waveform is normal
Check CN701 or
replace
U701,U707,
U702 U708
OK
OK
OK
OK
OK
NG
NG
NG
NG
Check reset circuit of
U401s normal
Check signal from
CN101 is normal
Replace X401
Check Correspondent
component
NG
NG
OK
Replace U401