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User’s Manual 6-8
NB500/NB505/NB520/NB525/NB550D/NB555D Series
Internal display panel
Apparent computer's display panel problems may be related to the
computer's setup and configuration - please refer to the HW Setup section
in Chapter 4, Utilities & Advanced Usage, for further information.
Hard disk drive
Problem Procedure
No display Press the FN + F5 hot keys to adjust the display
priority, and to make sure it is not set for output to
an external monitor.
Markings appear on
the computer's
display panel.
These marks may have come from contact with the
keyboard and Touch Pad while the display panel
has been closed. You should try to remove the
marks by gently wiping the display panel with a
clean dry cloth or, if this fails, with a good quality
LCD screen cleaner. In this latter instance you
should always follow the instructions with the
screen cleaner and always ensure you let the
display panel dry properly before closing it.
Problem Procedure
Computer does not
boot from hard disk
drive
Check to see whether there is a CD-ROM/DVD-
ROM in the optical disc drive - if so remove it and try
to start the computer again.
If this has no effect, check the Boot Priority setting
within the TOSHIBA HW Setup utility - please refer
to the Boot Priority section in Chapter 4, Utilities &
Advanced Usage for further information.
Slow performance The files on the hard disk drive may be fragmented -
in this instance you should run the disk
Defragmentation utility to check the condition of
your files and the hard disk drive. Please refer to the
operating system's documentation or online Help
File for further information on operating and using
the Defragmentation utility.
As a last resort you should reformat the hard disk
drive and then reload the operating system and all
other files and data. If you are still unable to resolve
the problem, contact your reseller, dealer or service
provider.