Battery - HP Pro 3400 Maintenance And Service Manual

6. Remove the six screws that secure the system board to the chassis.
NOTE:
7. Slide the system board toward the front of the chassis, and then lift it up and out of the chassis.
Figure 7-30
To install the system board, reverse the removal procedure.
NOTE: When replacing the system board, you must also change the chassis serial number in the
BIOS.
NOTE: After installing a new system board, always update the system ROM to ensure that the
latest version of the BIOS is being used on the computer. The latest system ROM BIOS can be found
at: http:\\h18000.www1.hp.com/support/files.

Battery

The battery that comes with your computer provides power to the real-time clock and has a lifetime of
about three years. When replacing the battery, use a battery equivalent to the battery originally
installed on the computer. The computer comes with a 3-volt lithium coin cell battery.
NOTE: The lifetime of the lithium battery can be extended by plugging the computer into a live AC
wall socket. The lithium battery is only used when the computer is NOT connected to AC power.
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 (140°F)
❑
Do not disassemble, crush, puncture, short external contacts, or dispose of in fire or water.
❑
❑ Replace the battery only with the HP/Compaq spare designated for this product.
HP Pro 3405 is secured with eight screws.
Removing the system board (HP Pro 3400 shown)
This computer contains an internal lithium manganese dioxide battery. There is a risk of
Battery 77