Apple PowerBook (2400c) - Manual (Page 84)

When the computer starts up, a message says there is not enough memory.
m There may not be enough memory to load all the system software
extensions you’ve installed. Restart the computer, holding down the
Shift key until you see the message “Extensions Off” in the “Welcome to
Macintosh” box. Then try the following to increase available memory:
m Turn on virtual memory (VM) in the Memory control panel, or increase
the VM size if it’s already on. Your PowerBook can deliver good
performance with VM set to two to three times the amount of actual
RAM chips in the computer.
m Reduce the size of the disk cache in the Memory control panel.
m If you use a RAM disk, reduce its size or turn it off in the Memory
control panel.
m Use the Extensions Manager control panel (in the Control Panels folder
inside the System Folder on your hard disk) to turn off extensions you
don’t need. Then restart the computer. (You can use Extensions Manager
to create different sets of extensions for special situations.)
You need to restart the computer for these changes to take effect.
m If these suggestions don’t work, you can increase memory by having an
Apple-authorized dealer install a RAM expansion card in your computer.
The computer won’t restart.
m If the computer freezes, you can try to “force” the program you’re using
to quit by simultaneously pressing the keys Command (x), Option, and
Esc on your keyboard. Then click Force Quit in the dialog box that
appears. (Note: Unsaved changes in your current documents will be
lost.) Immediately save all open documents, quit all other open programs,
and restart the computer.
m You may need to reset the computer. The method of resetting you should
always try first is to press the Command (x), Control, and Power keys
simultaneously. If the computer does not restart, connect the power adapter
(if it is not already connected) and press the reset button (marked with the
icon I) on the back panel.
Note: You will lose any work you have not saved.
m If the problem recurs, reset the parameter RAM (see “The Computer
Makes an Unusual Sound at Startup, or You See a ‘Sad Macintosh’ Icon” in
the section “Problems Starting Up the Computer” earlier in this chapter). If
the problem still occurs, see Chapter 7.
84 Chapter 6