Technical information

Your computer won’t restart, and there may or may not be a CD-ROM disc in the
CD-ROM drive.
m Your computer may be trying to start up from a CD-ROM disc. Press the Stop/Eject button of your
CD-ROM drive to open the door, and remove the CD-ROM disc. Close the door, then restart your
computer.
Your CD-ROM disc is vibrating in the CD-ROM drive.
m Some CD-ROM disc labels have artwork that is noticeably thicker on one side than the other and
can cause the disc’s weight to be slightly off-center. This uneven distribution of weight coupled with
the high rotation speed of your CD-ROM drive can occasionally cause some discs to wobble in the
drive and make your computer vibrate. The vibration doesn’t damage the CD-ROM disc or the
computer. If you can feel or hear that the CD-ROM disc is vibrating in the computer, you don’t need
to do anything special; continue to use the CD-ROM disc as you normally would.
Note: If you use a CD-ROM disc with a removable label, you can remove the label before inserting
the disc to see if that will prevent vibration.
You insert a CD-ROM disc, but its icon doesn’t appear on the Macintosh desktop.
m Make sure that the disc label is facing out and the disc is centered and pressed firmly into the drive.
m Make sure the door is closed all the way.
m Try restarting your computer.
m Make sure that the Apple CD-ROM extension is turned on in the Extensions Manager control panel.
(To find the Extensions Manager, choose Control Panels in the Apple [K] menu.) Then restart your
computer.
m Try starting your computer from the system software CD-ROM disc that came with your computer;
insert the CD and restart while holding down the C key. (For detailed steps, see “Starting Up From
the System Software CD-ROM Disc” in Chapter 13.) If the hard disk icon appears on the desktop but
the CD-ROM disc icon doesn’t appear, then there may be a hardware problem with your CD-ROM
drive. If the CD-ROM disc icon appears above the hard disk icon, reinstall your CD-ROM software.
The easiest way to do this is by reinstalling your system software, following the instructions in
“Installing System Software” in Chapter 13.
Chapter
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