Apple Macintosh LC 630 DOS - Manual (Page 94)

A “sad Macintosh” icon appears and the computer won’t start up.
This icon indicates that your Macintosh cannot start up because of a problem
with the system software or the computer hardware.
Eject any floppy disks by turning off the computer and then holding down
the mouse button while you turn the computer on again. Try starting up with
the Disk Tools floppy disk or (if you have a built-in CD-ROM drive) with the
CD-ROM disc that contains system software. (For instructions on how to start
up your computer from the CD-ROM disc, see “Starting Up From a CD-ROM
Disc” in the section “Initializing a Hard Disk” later in this chapter.) If the “sad
Macintosh” icon appears again, consult the service and support information
that came with your computer for information on contacting an Apple-
authorized service provider or Apple for assistance.
The Macintosh “hangs” or freezes during startup.
If the Mac OS is sharing 16MB or more of memory with the PC environment
and Disklight of Norton Utilities 3.1.1 is installed, the computer will freeze
during startup. This does not occur with 8MB or less shared memory. Restart
the Macintosh using one of the techniques described in “Start Over” in the
section “When You Run Into Trouble,” earlier in this chapter. Open the PC
Setup control panel and change the shared memory setting to 8 MB or less.
The hard disk icon does not appear on the desktop.
If you don’t see a hard disk icon on the desktop, try the following:
m If the hard disk is internal, shut down your computer, wait at least 10
seconds, and then turn it on again.
m If the hard disk is external, make sure that it is turned on and that its cable
is connected firmly; then restart the Macintosh.
m Check the ID numbers of all SCSI equipment connected to your computer.
See the manuals that came with your SCSI equipment for information on
setting SCSI ID numbers.
83 Troubleshooting in the Macintosh Environment