Apple Power Macintosh 4400 - Manual (Page 147)

Other important safety instructions to keep in mind as you use your
CD-ROM drive:
m Position your computer so that when the tray opens, it doesn’t bump
into anything.
m Do not leave the disc tray open. If dust gets on the lens of the CD-ROM
drive, the drive may have problems reading your compact discs.
m Do not put anything (for instance, a cup) on top of the tray when it is open.
m Do not force the tray open by hand.
m Do not wipe the lens with a paper towel or other abrasive surface. If you
need to clean the lens, see an Apple-authorized service provider for a
lens cleaner.
m Never transport your computer with a disc inside the CD-ROM drive.
m Keep your computer equipment away from any source of liquid (such as
washbasins, bathtubs, and shower stalls). If you drink coffee or other
beverages while you’re at your computer, take care not to spill.
m Avoid exposing your equipment to damp or wet weather. If your system is
near a window, be sure the window is closed in rainy weather.
The tray on your CD-ROM drive automatically closes when you shut down
your computer. Open the tray and take your disc out before shutting down.
Power supply
The power supply in your computer is a high-voltage component and
should not be opened for any reason, even when the computer is off. If the
power supply needs service, contact your Apple-authorized dealer or
service provider.
147 Health, Safety, and Maintenance Tips