HP L1940T - Page 18

19" LCD Color Monitor HP L1940T
18
8.1 Main Board
1. No power
No power
Press power key and look if the
picture is normal
Please reinsert and make sure the
AC of 100-240 is normal
Reinsert or check the
power section
Y301 oscillate waveforms are
normal
Measure CN401 PIN7/8=12V?
PIN10/11=3.3V?
PIN13/14=5V?
Check power section
Replace U401
Replace Y301
OK
Replace U403
OK
OK
NG
NG
NG
NG
NG