Fujitsu Siemens Computers SP716, Service Manual

Page: 9 / 28

SP716/SP916 9 / 20
E . TROUBLE SHOOTING HINTS
NO NO
YES YES
YES YES
NO NO
High Voltage !
NO
YES YES
NO NO
YES
No Display
( Black )
LED ON
?
Push the power
ON/OFF
switch
LED Color
change ?
Check main
board U5/Pin24
Hi / Lo under
push power
sw?
Back light
ON?
To Step 2
Make sure the
connection of
power board is
fine
+12V ?
Check the
CN1
/Pin1,2 of
power board
Check
Power board
B
Display ?
Nice Job !
A
To Step 2
Power
Supply ?
Change
power
board