HP dc5750 manual Battery Replacement

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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

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Contents Hardware Reference Guide dc5750 Small Form Factor Model Hardware Reference Guide About This Book Iv About This Book Table of contents Appendix D Electrostatic Discharge Standard Configuration Features Product FeaturesFront Panel Components Drive configuration may vary by model2Rear Panel Components Rear Panel Components3Keyboard Components KeyboardUsing the Windows Logo Key Serial Number Location Special Mouse FunctionsServiceability Features Hardware UpgradesUsing the Small Form Factor Computer in a Tower Orientation Using the Small Form Factor Computer in a Tower Orientation 2Removing the Computer Access Panel Hardware Upgrades Removing the Computer Access Panel3Replacing the Computer Access Panel Replacing the Computer Access PanelRemoving the Front Bezel 4Removing the Front Bezel Hardware Upgrades5Removing a Bezel Blank Replace the front bezel Removing Bezel BlanksReplacing the Front Bezel 6Replacing the Front Bezel Hardware UpgradesInstalling Additional Memory DIMMsDDR2-SDRAM DIMMs Description Socket Color Populating Dimm SocketsInstalling DIMMs 9Rotating Optical Drive Retainer Up Hardware Upgrades Enww Description Removing or Installing an Expansion Card12Removing the Expansion Slot Retainer 13Removing an Expansion Slot Cover Hardware Upgrades 15Removing a PCI Express x16 Expansion Card 16Installing an Expansion Card Hardware Upgrades Replace the slot cover retainer 18Drive Positions Drive PositionsInstalling and Removing Drives Removing an Optical Drive 20Removing the Optical Drive 22Installing the Optical Drive Hardware Upgrades Enww Removing a Diskette Drive 24Disconnecting the Diskette Drive Cables Hardware Upgrades26Removing the Diskette Drive Enww 29Installing a Diskette Drive Enww Enww 32Disengaging the Diskette Drive Hardware Upgrades 34Disconnecting the Hard Drive Power Cable and Data Cable Enww Enww Enww Power Supply 115V 230V SpecificationsRated Input Current maximum1 Battery Replacement Type Figure B-2Removing and Replacing a Coin Cell Battery Type Enww Installing a Security Lock External Security DevicesCable Lock Padlock Electrostatic Discharge Preventing Electrostatic DamageGrounding Methods Appendix D Electrostatic Discharge Computer Operating Guidelines and Routine Care Shipping Preparation Optical Drive PrecautionsCleaning SafetyIndex Enww
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