HP dc72 Client manual Type

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5.If the computer is on a stand, remove the computer from the stand.

6.Remove the computer cover.

CAUTION After removing the computer cover, look for the LED on the system board between the DIMM sockets. If the LED is illuminated, the system still has power. Turn off the computer and remove the power cord before proceeding.

7.Locate the battery and battery holder on the system board.

NOTE On some computer models, it may be necessary to remove an internal component to gain access to the battery.

8.Depending on the type of battery holder on the system board, complete the following instructions to replace the battery.

Type 1

a. Lift the battery out of its holder.

Figure B-1Removing a Coin Cell Battery (Type 1)

b.Slide the replacement battery into position, positive side up. The battery holder automatically secures the battery in the proper position.

Type 2

a.To release the battery from its holder, squeeze the metal clamp that extends above one edge of the battery. When the battery pops up, lift it out (1).

44 Appendix B Battery Replacement

ENWW

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Contents

HP Compaq Business PC Hardware Reference Guide About This Book About This Book Table of contents Appendix D Electrostatic Discharge Product Features Standard Configuration FeaturesDrive configuration may vary by model Front Panel ComponentsMedia Card Reader Components 2Media Card Reader ComponentsRear Panel Components 3Rear Panel ComponentsKeyboard 4Keyboard ComponentsUsing the Windows Logo Key Special Mouse Functions Serial Number LocationEnww Hardware Upgrades Serviceability FeaturesUsing the Small Form Factor Computer in a Tower Orientation Unlocking the Smart Cover Lock Smart Cover FailSafe KeyEnww Removing the Computer Cover 3Removing the Computer Cover4Replacing the Computer Cover Hardware Upgrades Replacing the Computer CoverDDR2-SDRAM DIMMs Installing Additional MemoryDIMMs Populating Dimm Sockets Description Socket ColorInstalling DIMMs Enww Removing or Installing an Expansion Card DescriptionEnww 9Removing an Expansion Slot Cover Enww Enww Drive Positions 13Drive PositionsInstalling and Removing Drives 14Rotating the Drive Cage Up Hardware Upgrades Removing an Optical Drive16Rotating the Drive Cage Down Installing an Optical Drive into the 5.25-inch Drive Bay 17Removing the Optical Drive19Installing the Optical Drive 21Connecting the Power and Data Cables Hardware Upgrades Removing an External 3.5-inch Drive Enww Enww Installing a Drive into the 3.5-inch External Drive Bay Enww Enww Enww 32Removing the Security Clip Hardware Upgrades 34Disconnecting the Hard Drive Power Cable and Data Cable Enww Specifications Desktop DimensionsAppendix a Specifications Battery Replacement Type Figure B-2Removing and Replacing a Coin Cell Battery Type Enww Cable Lock Installing a Security LockExternal Security Devices Padlock Grounding Methods Electrostatic DischargePreventing Electrostatic Damage Appendix D Electrostatic Discharge Computer Operating Guidelines and Routine Care Safety Optical Drive PrecautionsCleaning Shipping PreparationIndex Enww