You inadvertently delete a program from your computer’s hard disk.

mYou can replace any of the software that came with your computer by dragging it from the Macintosh Performa CD: Performa Software to your hard disk. See the section “Copying Files From the CD-ROM Disc to Your Hard Disk” in Chapter 7.

When you start up, a disk icon with a blinking question mark appears in the middle of the screen.

This icon indicates that your Macintosh cannot find the system software it needs to start up. One of the following is probably the cause:

mYour computer may be having a problem recognizing external SCSI (Small Computer System Interface) equipment, such as hard disks, CD-ROM drives, and scanners that you may have connected to your computer.

Shut down your computer, turn off all external 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 both to the manuals that came with the equipment and Chapter 3 of this manual, which has information on the proper way to connect SCSI equipment and assign SCSI ID numbers.

If you have a printer connected to your computer’s SCSI port, make sure your printer is connected properly. Most printers connect to the printer port, not the SCSI port. Check the manuals that came with your printer for information on how to connect it properly.

mSystem 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 Macintosh Performa CD: Performa Software. Do this by inserting the CD-ROM disc into the CD-ROM drive and holding down the C key while you restart the computer. (See the section “Starting Up From the Macintosh Performa CD: Performa Software” later in this chapter if you need more help.) Then follow the instructions in “Repairing a Damaged Disk” later in this chapter to test your startup hard disk and repair any damage.

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Apple 6400 appendix Troubleshooting