Apple PowerBook (Duo 270C) - Manual (Page 287)

Protecting the PowerBook Duo system
from theft
The Duo Dock, Duo MiniDock, and Duo Floppy Adapter all have a
security slot to which you can connect a locking device and
security cable.
If you attach the cable to the Duo Floppy Adapter, for example,
and then connect the adapter to your computer, the adapter and
computer are both protected because the floppy adapter cannot
be removed from the computer until the security cable is
detached.
See your Apple-authorized reseller for more information about
this security system.
Service and support
If the PowerBook malfunctions or is damaged
If your computer is malfunctioning but does not appear to be
physically damaged, shut it down (and leave the power adapter
plugged in, if possible) until you can get help.
If you know or suspect that your computer is physically damaged,
disconnect the power adapter, remove the battery, and do not use
the computer until it can be repaired.
How to get help
For information on service and support, see the resource
information that came with your computer for instructions on
how to contact an Apple-authorized service provider or Apple for
assistance.
Chapter 14: Travel, Storage and Service 271