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m Sometimes incompatible system extensions or control panels can cause
system software problems. Restart while holding down the Shift key to
temporarily turn off all system extensions.
If your computer works normally after you do this, use the Extensions
Manager control panel to turn off individual extensions and control panels.
For detailed instructions, see the “Customizing Your Computer” or
“Setting Options” topic of Macintosh Guide, available in the Guide (h)
menu.
If your computer performs better when a particular extension or control
panel is turned off, contact the extension’s or control panel’s manufacturer
for information or an upgrade.
m If the problem recurs, you may need to reinstall system software. See
“Installing or Reinstalling System Software” later in this chapter for
instructions.
The pointer (
8
) doesn’t move when you move the mouse.
One of the following situations is probably the cause:
m Your system has a software problem.
Press 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.
If that doesn’t solve the problem, follow the suggestions in the previous
section, “A Dialog Box With a Bomb Appears.”
m Your keyboard or mouse cable connection may have been loosened or
disconnected. Turn the computer off using the power button on the front of
the computer, check that the mouse and keyboard cables are connected
properly, and then restart the computer.
IMPORTANT
Do not connect or disconnect the mouse or keyboard while the
computer is turned on. You may damage your computer.
73
Troubleshooting