4.Hold down the keys until you hear the startup sound again.
5.If the computer shuts itself off, press the Power key to turn it back on.
6.When the computer has finished starting up, restore any custom control panel and network settings.
mIf nothing happens after you reset the PRAM, there may be a problem with a RAM expansion card. If you installed a RAM expansion card in your computer, check Appendix C to make sure the card is properly installed. If you purchased an expansion card from a
See also “The Computer Makes Unusual Sounds” in the section “Other Problems While Working” later in this chapter.
The computer starts up, but the desktop doesn’t appear.
mThe screen brightness may be turned down. Adjust the brightness control (¤), located above the top row of keys on the keyboard, to the right of center.
mThe computer may be trying to start up using an external hard disk that does not contain the correct system software. Disconnect the external hard disk and restart your computer. (This can also happen with PC Card drives and expansion bay drives.)
mStart the computer, holding down the Shift key until you see the message “Extensions off” in the Welcome to Macintosh box. If the computer starts up, turn to Chapter 8 and try the steps given in the section “Checking Your System Software Extensions.” You can go directly to the Extensions Manager control panel by holding down the Space bar during startup.
When you start up the computer, you see a message about the system software.
mThe system software on the startup disk you’re using may be incomplete or damaged, or may be the wrong version. Make sure you’re using the correct disk as a startup disk.
mIf you’re sure you’re using the correct startup disk, you may need to reinstall system software. See “Reinstalling System Software” in Chapter 8.
