Learn how to replace the PRAM battery in your Power Mac G5. The time and date, as well as other settings, are kept by the PRAM battery when your machine is off.
Remove all the cables, including the power cables before opening the unit.
Lift the tab to unlock the side panel.
Remove the air deflector (the clear plastic cover) by pulling on the handle.
Locate the battery inside the desktop.
Remove the battery by lifting the battery from the battery terminal.
The area should look like this after the battery is removed.