HP LP2475w Service Manual page 40

24" LCD Color Monitor
No picture (CVBS / S-VIDEO/ YPBPR)
Measure U406 PIN 5/6 = 1.8 V
Check the output wave of U104
Check if the signal from CVBS /
S-VIDEO input and video cable is
connected normally
No picture
U407 PIN 2 = 2.5 V
U403 PIN 2 = 3.3 V
NG
OK
X101 oscillate waveforms
are normal
NG
OK
NG
X101 oscillate waveforms
are normal
OK
OK
Replace U104
Replace U406, Q407, U403
Replace X101
OK
Replace U104
NG
Replace X101
Input the signal of CVBS /
NG
S-VIDEO/YPBPR, or change the
cable
40
HP LP2475w