Apple iMac G5 - Manual (Page 48)

48 Chapter 4 Enhancing Your Computer
Replacing the Internal Backup Battery
Your iMac G5 has an internal backup battery that preserves certain settings, such as the
date and time, when the computer is off. If you have problems starting up your
computer or if settings change when you start up the computer, you may need to
replace the internal backup battery.
Note: If your computer is plugged into a power strip, Apple recommends you leave the
strip turned on to avoid shortening battery life.
To replace an internal backup battery in your iMac G5:
1 Turn your computer off by choosing Apple () > Shut Down. Disconnect all cables and
the power cord from your computer.
2 Place a soft, clean towel or cloth on the desk or surface. Hold the sides of the computer
and slowly lay it down so the screen is flat against the surface and the bottom is facing
towards you.
3 Raise the stand and use a Phillips #1 screwdriver to loosen the three captive screws at
the bottom of the computer by turning them counter-clockwise.
· Warning: The ambient light sensor is located to the left of the middle screw, as
shown in the illustration. Don’t mistake the ambient light sensor for a screw. Sticking
a screw driver or other sharp object in the ambient light sensor could damage your
computer.
Raise
stand Phillips
screwdriver
Loosen 3
screws
Screw
Ambient
light sensor