Apple Power Macintosh 4400 - Manual (Page 179)

The tray on your CD-ROM drive automatically closes when you shut down
your computer. You may want to open the tray and take out your CD-ROM
disc 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.
Cleaning your equipment
Follow these general rules when cleaning the outside of your computer and
its components:
m Use a damp, soft, lint-free cloth to clean the computer’s exterior. Avoid
getting moisture in any openings.
m Don’t use aerosol sprays, solvents, or abrasives.
Cleaning the computer case
To clean the case, do the following:
1 Turn off the computer completely and then disconnect the power plug. (Pull the plug, not
the cord.)
2 Wipe the surfaces lightly with a clean, soft cloth dampened with water.
WARNING To protect the power supply from damage, make sure the
voltage switch on the back of the computer is set correctly before you
plug the computer into a power outlet. Refer to Chapter 1 for
instructions on setting the voltage switch.
179 Health, Safety, and Maintenance Tips