B
Battery Replacement
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!
The computer contains an internal lithium manganese dioxide battery. There is a
risk of 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 (140ºF).
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
Before replacing the battery, it is important to back up the computer CMOS settings.
When the battery is removed or replaced, the CMOS settings will be cleared. Refer to the
Computer Setup (F10) Utility Guide
on the
Documentation and Diagnostics CD
for information
on backing up the CMOS settings.
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.
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.
HP encourages customers to recycle used electronic hardware, HP original print cartridges, and
rechargeable batteries. For more information about recycling programs, go to
http://www.hp.com/
recycle
.
1.
Remove/disengage any security devices that prohibit opening the computer.
2.
Remove all removable media, such as diskettes or compact discs, from the computer.
3.
Turn off the computer properly through the operating system, then turn off any external devices.
4.
Disconnect the power cord from the power outlet and disconnect any external devices.
CAUTION
Regardless of the power-on state, voltage is always present on the system
board as long as the system is plugged into an active AC outlet. You must disconnect the
power cord to avoid damage to the internal components of the computer.
ENWW
45
Summary of Contents for Compaq dc5750 SFF
Page 1: ...Hardware Reference Guide dc5750 Small Form Factor Model HP Compaq Business PC ...
Page 4: ...iv About This Book ENWW ...
Page 48: ...42 Chapter 2 Hardware Upgrades ENWW ...
Page 56: ...Padlock Figure C 2 Installing a Padlock 50 Appendix C External Security Devices ENWW ...
