Dell SP2009W - Widescreen LCD Monitor Service Manual page 51

20" LCD Color Monitor
No picture (LED orange)
No picture
The button if
under control
OK
Measure U701 PIN2=3V
U702 PIN2=2V
OK
X401 oscillate
waveform is normal
OK
Check HS/VS from
Replace U401
CN101is normal
OK
Replace U401
NG
NG
Replace
U701, U702
NG
NG
X402 oscillate
waveform is normal
OK
Check reset circuit of
U402 is normal
OK
Replace U402
Replace X401
Check Correspondent
component
51
Dell SP2009Wc
NG
Replace X402
NG
Check Correspondent
component