Apple PowerBook (2400c) User Manual download pdf (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.

Chapter 6

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Apple PowerBook (2400c) User Manual Page 84