HP dc72 Client manual 3Removing the Computer Cover

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Removing the Computer Cover

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.

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

6.Press the buttons on the left and right sides of the computer (1) then slide the computer cover forward until it stops (2) and lift it up and off the chassis.

Figure 2-3Removing 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.

ENWW

Removing the Computer Cover 13

Image 19 Contents
HP Compaq Business PC Hardware Reference Guide About This Book About This Book Table of contents Appendix D Electrostatic Discharge Standard Configuration Features Product FeaturesFront Panel Components Drive configuration may vary by model2Media Card Reader Components Media Card Reader Components3Rear Panel Components Rear Panel Components4Keyboard Components KeyboardUsing the Windows Logo Key Serial Number Location Special Mouse FunctionsEnww Serviceability Features Hardware UpgradesUsing the Small Form Factor Computer in a Tower Orientation Smart Cover FailSafe Key Unlocking the Smart Cover LockEnww 3Removing the Computer Cover Removing the Computer CoverReplacing the Computer Cover 4Replacing the Computer Cover Hardware UpgradesDIMMs Installing Additional MemoryDDR2-SDRAM DIMMs Description Socket Color Populating Dimm SocketsInstalling DIMMs Enww Description Removing or Installing an Expansion CardEnww 9Removing an Expansion Slot Cover Enww Enww 13Drive Positions Drive PositionsInstalling and Removing Drives Removing an Optical Drive 14Rotating the Drive Cage Up Hardware Upgrades16Rotating the Drive Cage Down 17Removing the Optical Drive Installing an Optical Drive into the 5.25-inch Drive Bay19Installing 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 Desktop Dimensions SpecificationsAppendix a Specifications Battery Replacement Type Figure B-2Removing and Replacing a Coin Cell Battery Type Enww External Security Devices Installing a Security LockCable Lock Padlock Preventing Electrostatic Damage Electrostatic DischargeGrounding Methods Appendix D Electrostatic Discharge Computer Operating Guidelines and Routine Care Shipping Preparation Optical Drive PrecautionsCleaning SafetyIndex Enww