Trouble Shooting - Fujitsu Siemens Computers B19-2 Service Manual

8.2 TROUBLE SHOOTING

8.2.1 MAIN BOARD
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 U201 PIN2=1.8V
U202 PIN2=3.3V
OK
X601 and X401 oscillate
waveforms are normal
OK
Replace U601
NG
Replace U401
NG
NG
NG
Page 34 of 55
Reinsert or check the
Adapter/Inverter
section
Check CN201 or replace
U201, U202
Replace X601, X401
FSC B19-2