Apple Power Macintosh 4400 - Manual (Page 95)

When you start up, a disk icon with a blinking question mark appears in the middle of
the screen for more than several seconds.
This icon indicates that your Macintosh cannot find the system software it
needs to start up. One of the following is probably the cause:
m System software is not installed on the startup hard disk, the system
software is damaged, or the hard disk is not working properly.
Start up your computer using 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.) Then follow the
instructions in “Testing and Repairing a Damaged Disk” later in this
chapter to test your startup hard disk and repair any damage.
If repairing the disk doesn’t help, follow the instructions in “Installing or
Reinstalling System Software” later in this chapter to reinstall system
software on your startup hard disk.
m Your computer may be having a problem recognizing external SCSI (Small
Computer System Interface) equipment that is being used as a startup
device instead of your hard disk.
Turn off all SCSI equipment and disconnect the first SCSI device in the
chain from your computer’s SCSI port. Then restart the computer. If the
computer starts up after you disconnect your SCSI equipment, refer to the
manuals that came with the equipment for information on the proper way
to connect SCSI equipment and assign SCSI ID numbers.
95 Troubleshooting