Fujitsu Siemens Computers B19-2 Service Manual page 36

White screen
Check Q204,Q203 are
broken or CN503 solder?
Check Correspondent
component.
White screen
Measure Q204 base
is high level?
OK
NG
OK
Replace PANEL
Page 36 of 55
NG
X601 oscillate
waveform is normal
OK
Check reset circuit of
U601 is normal
OK
Replace U601
FSC B19-2
NG
Replace X601
NG
Check Correspondent
component.