Apple 640 manual Icons do not appear correctly on your screen

Icons do not appear correctly on your screen.

You need to rebuild the desktop—a process that helps your Macintosh keep track of files and folders on your hard disks. For instructions, see “Rebuild Your Desktop Regularly” in the section “If You Have Trouble” earlier in this chapter.

If icons do not appear correctly after you rebuild the desktop, restart your computer while pressing the Shift key to temporarily turn off system extensions. When you see the “Welcome to Macintosh—extensions off” message, release the Shift key and press the Option and x keys until you see a message asking if you want to rebuild the desktop.

Your Macintosh can’t read a floppy disk.

If you see a message that a floppy disk is unreadable, try one of the following:

mIf the disk has never been used, you may simply need to initialize it. For

instructions, see the “Disks” topic of Macintosh Guide, available in the Guide (h) menu.

mThe disk may be damaged. See “Repairing a Damaged Disk” later in this chapter for information on testing and repairing disks.

mIf the disk is a high-density disk previously used on another computer, the disk may have been formatted incorrectly as an 800K disk rather than as a 1440K (high-density) disk. If so, use the other computer to copy the disk’s contents onto a properly formatted disk.

mThe disk may have been formatted for use on another kind of computer. You may be able to use a program that lets you work with such disks on your Macintosh.

mThe disk may be a DOS disk that the Macintosh environment cannot use. Try switching to the PC environment and inserting the disk again.

Troubleshooting in the Macintosh Environment 87