Toshiba NB250 Maintenance Manual page 35

2 Troubleshooting Procedures
Does typed characters appear correctly?
Insert USB memory disk. Then run the
diagnostics test program
Is the diagnostics test loaded?
Allow each test to perform
automatically
Is an error detected by any of the
diagnostics tests?
System is normal
NB250/NB255 Series Maintenance Manual
A
Yes
Yes
Yes
No
End
Figure 2-1 Troubleshooting flowchart (2/2)
No
No
Yes
6
Perform the Keyboard
Troubleshooting procedures
in section 2.6
Perform the FDD
Troubleshooting procedures
in section 2.5
After confirming which
diagnostics test has detected
an error, perform the
appropriate procedure as
outlined below.