Trouble Shooting; Main Board - HP VS19T Service Manual

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 CN201 PIN5/6=12V?
Measure CN201 PIN7/8=5V?
OK
Y601 oscillate waveforms are
normal
NG
OK
Replace U601
NG
Replace U401
NG
NG
Check power section
Replace Y601
30
Reinsert or check the
power section
HP VS19T