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Replacing the CMOS Battery for HP Pavilion 23-p000 All-in-One PCs

This document applies to HP Pavilion 23-p000 All-in-One PCs.

Before you begin

CMOS factory settings should be restored as a first step before replacing the system motherboard. To restore the CMOS factory settings, replace the CMOS battery.

You need a Phillips head screwdriver.
You need a flat head screwdriver.
Turn off the computer. Disconnect the Ethernet or modem cable. Disconnect the power cord.
Transfer the computer to a clean, flat, stable work surface over a noncarpeted floor. HP recommends that you put down a blanket, towel, or othersoft cloth to protect the screen from scratches or other damage.
Electrostatic discharge (ESD) can damage your processor, disk drives, expansion boards and other components. HP strongly recommends the use of an antistatic wrist strap and a conductive foam pad when working on the computer.
Do not remove a component from its protective packaging until you are ready to install it.

caution:
This product contains components that can be damaged by electrostatic discharge (ESD). To reduce the chance of ESD damage, work over a noncarpeted floor, use a static dissipative work surface (such as a conductive foam pad), and wear an ESD wrist strap connected to a grounded surface.

Video overview

View the following video before using the steps in this article.

note:
For best quality on dial-up connections, wait until the video has fully loaded before viewing.

Removing the CMOS battery

If the computer clock is losing time, change the CMOS battery. After replacing the battery with these instructions, it is necessary to reset the clock in the BIOS.

Use the following steps to remove the CMOS battery:

Step 1 Remove the rear cover. For instructions to remove the rear cover, see the HP support document, Removing and Replacing the Rear Cover.
Step 2 Remove the two Philips #2 screws securing the motherboard shield to the PC.
The screw locations are indicated by a stencil of an arrow with no circles inside.
Step 3 Tilt up the inside edge of the shield and pull it off the unit.
Step 4 To remove the CMOS battery, pry it up out of its socket and lift the battery off the motherboard. Wait at least thirty seconds before replacing the battery.