Apple 8600 appendix Problems with hard disks, Problems with your computer’s speed

Problems with hard disks

The computer won’t start up from the internal hard disk, or the hard disk icon doesn’t appear on the desktop.

mThere may be a temporary software problem. Turn off the computer, wait at least 10 seconds, and then turn it on again.

mThere may be a problem with your startup disk or with its system software. See “Testing and Repairing Your Hard Disk” in Chapter 11, “Diagnostic Techniques.”

The computer is using the wrong disk as a startup disk.

mOpen the Startup Disk control panel and make sure the correct disk is selected. Then restart the computer.

mIf you’re trying to start up from an external hard disk, your computer may be having a problem recognizing the disk, which is a SCSI device. Refer to both the manual that came with the hard disk and Chapter 7, “Connecting Additional Equipment,” which has information on the proper way to connect SCSI equipment and assign SCSI ID numbers.

mReset the PRAM and NVRAM by following the instructions in “The Computer Makes an Unusual Sound at Startup” earlier in this chapter.

Problems with your computer’s speed

Your computer’s performance decreases

mIf you notice a decrease in your computer’s speed and general performance after you install a control panel or system extension, it may be because the software is not compatible with either Macintosh computers built with the PowerPC microprocessor or with other system extensions.

To find out if a system extension or control panel is the problem, follow the instructions in the section “Checking Your System Extensions” in Chapter 11, “Diagnostic Techniques.”

Solutions to Common Problems 171