Apple Macintosh PowerBook 150 - Manual (Page 112)

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 your system software. See Chapter 1 for
instructions on using the PowerBook 150 Restore program.
Power
The battery is draining too fast.
m Turn 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 or in the AppleTalk Switch module of the
Control Strip.
m Your battery may need to be reconditioned. See Chapter 6 for more
information.
m You may not have the correct power adapter. Make sure you are using the
power adapter that came with your computer.
m Old batteries do not hold a charge as well as new ones do. You may need to
replace the battery.
104 Chapter 9