Apple LC 580 manual Pointer 8 freezes on the screen

If you are trying unsuccessfully to use a DOS floppy disk, consider the following:

mWhen formatting floppy disks on a DOS computer for use in a Macintosh, users need to format standard double-sided disks as 720K disks and high- density disks as 1440K disks. Because DOS computers allow standard double-sided disks to be formatted in 1440K format and high-density disks to be formatted in 720K format, it’s possible that your disk has been given a format that won’t work in a Macintosh.

If you think your DOS floppy disk might have a format that doesn’t work in a Macintosh, use a DOS computer to copy the contents of your DOS floppy disk onto another DOS floppy disk that has been properly formatted for use in a Macintosh.

The pointer (8) freezes on the screen.

Your system has a software problem.

mPress x-Option-Esc to quit the application program in use when the problem occurred. If this works, you can save the documents open in other programs before restarting.

mRestart your Macintosh. (For instructions, see “Start Over” in the section “When You Run Into Trouble” earlier in this chapter.) Most software problems are temporary, and restarting usually corrects the problem.

mCheck the startup disk and program you were using when the problem occurred. Make sure that all programs, desk accessories, and system extensions you’re using are compatible with the system software.

mSometimes incompatible system extensions or control panels can cause system software problems. Restart while holding down the Shift key; this temporarily turns off all system extensions. If your computer works normally after you do this, remove all extensions from the Extensions folder (inside the System Folder) and put them back into the Extensions folder one at a time. Restart after you add each extension. This procedure should identify any incompatible extensions.

You can also use the Extensions Manager control panel to turn off individual extensions. For information on using this control panel to

manage system extensions, see the “Setting Options” topic of Macintosh Guide, available in the Guide (h) menu.

mIf the problem recurs, you may need to reinstall system software. See “Installing or Reinstalling System Software” later in this chapter for instructions.

Troubleshooting 47