HP VS19T Service Manual page 31

No picture (LED is orange)
X401 oscillate waveforms
are normal
OK
Check if the sync signal from
computer is output and video cable
is connected normally
No picture
Key is under control?
OK
NG
NG
OK
Replace U401
NG
Y601 oscillate waveforms are
normal
Replace X401
Input the sync signal of computer, or
change the cable
31
NG
Replace Y601
OK
Replace U601
NG
Replace U401
HP VS19T