Replacing The Battery - HP Compaq Pro 4300 All-in-One Hardware Reference Manual

15.
To replace the center access panel, insert the bottom edge of the panel, then press down firmly on
each side of the panel working from the bottom to the top so that the panel snaps securely in
place.
Figure 2-11
16. Lock any security devices that were disengaged when the center access panel was removed.
17.
Reconnect the power cord and external devices, then turn on the computer. The computer
automatically recognizes the additional memory when you turn on the computer.

Replacing the Battery

The battery is located in the memory compartment. The battery that comes with the computer provides
power to the real-time clock. When replacing the battery, use a battery equivalent to the battery
originally installed in the computer. The computer comes with a 3-volt lithium coin cell battery.
WARNING!
fire and burns if the battery is not handled properly. To reduce the risk of personal injury:
Do not attempt to recharge the battery.
Do not expose to temperatures higher than 60° C (140º F).
Do not disassemble, crush, puncture, short external contacts, or dispose of in fire or water.
Replace the battery only with the HP spare designated for this product.
CAUTION:
When the battery is removed or replaced, the CMOS settings will be cleared.
Static electricity can damage the electronic components of the computer or optional equipment. Before
beginning these procedures, ensure that you are discharged of static electricity by briefly touching a
grounded metal object.
14 Chapter 2 Hardware Repair and Upgrade
Replacing the Center Access Panel
The computer contains an internal lithium manganese dioxide battery. There is a risk of
Before replacing the battery, it is important to back up the computer CMOS settings.