HP Pavilion xl900 - Desktop PC Service Manual page 56

To replace the battery:
1 Turn off the computer and all peripherals.
2 Disconnect the modem/phone cable.
3 Disconnect the power cord and all other
attached cables (such as the keyboard, mouse,
and monitor).
4 Remove the side panel (see "Removing the
Side Panel" on page 34).
5 If necessary to reach the battery, slide the
drive cage out (see "Sliding the Drive Cage In
and Out" on page 35).
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6 If necessary to reach the battery, open the
back panel door (see "Opening the Back
Panel Door" on page 37).
7 Gently lay the computer on its side.
8 Remove any cards that restrict access to the
battery.
9 With a pen or screwdriver, press the metal
latch that holds the battery in its socket. The
battery will pop out.
10 Install the new CR2032 battery in the socket,
with the positive (+) side facing up.
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