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m You may have a virus on your hard disk. Obtain a virus-detection program,
use it to check all your disks, and eliminate any viruses the program finds.
m You may be using a program that’s not compatible with your computer’s
system software. Check the manual that came with the program or contact
the manufacturer.
m You may have added a control panel or extension that is incompatible with
other programs you use. Restart the computer, holding the Shift key down,
until you see the message “Extensions off.” If this solves the problem,
remove any control panels or extensions you recently installed.
m You may need to reinstall system software. See Appendix A for
instructions on installing system software.
Power
The battery is draining too fast.
m Tu r n down the screen brightness, turn off virtual memory, move the battery
conservation slider in the PowerBook control panel to Better Conservation,
or work with the power adapter plugged in.
m Your computer supplies power to the modem whenever a communications
program is open. Quit your communications program if you aren’t using it.
m If you aren’t using network services, you can also save power by turning off
AppleTalk in the Chooser.
m Your battery may need to be reconditioned completely. See Chapter 6 for
help.
m You may not have the correct power adapter. Make sure that if you are
using a PowerBook Duo 230 or 280, you have a 25-watt adapter, and if you
are using a PowerBook Duo 280c, you have a 36-watt adapter.
m Older PowerBook batteries do not hold a charge as well as new ones do.
You may need to replace the battery.
The battery can’t be recharged.
m There may be a loose connection. Take the battery out and put it back in
the computer.
m If all connections are OK, then the battery is probably damaged or dead.
Yo u’ ll need to obtain a replacement battery from an Apple-authorized
dealer.
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Chapter 10