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86 Appendix B
Safety Instructions for Setting Up and Using Your Computer
Plugging In the Power Adapter
Always leave space around your power adapter. Do not use this equipment in a location
where airflow around the power adapter is confined. Always disconnect the power adapter
and remove the battery before opening the computer to perform procedures such as
installing memory or removing the hard disk.
Connecting a Phone Line to the Internal Modem
Always disconnect the phone cord before opening the computer to perform procedures
such as installing memory or removing the hard disk.
Using Your PowerBook
When using your PowerBook or when charging the battery, it is normal for the bottom of the
case to get warm. The bottom of the PowerBook case functions as a cooling surface that
transfers heat from inside the computer to the cooler air outside. The bottom of the case is
raised slightly to allow airflow that keeps the unit within normal operating temperatures.
Warning Use only the power adapter that came with your PowerBook computer.
Adapters for other electronic devices (including other PowerBook models and other
portable computers) may look similar, but they may damage your computer. If your power
adapter came equipped with a three-wire grounding plug (a plug that has a third
grounding pin), then this plug will fit only a grounded AC outlet. If you are unable to
insert the plug into the outlet because the outlet is not grounded, contact a licensed
electrician to replace the outlet with a properly grounded outlet. Do not defeat the
purpose of the grounding plug!
Warning Do not connect a digital telephone line to the modem, because the wrong type
of line could damage the modem.
Warning Never turn on your computer unless all of its internal and external parts are in
place. Operating the computer when it is open or missing parts can be dangerous and
damage your computer.