Lenovo 9953, 9705, 9625, 9421, 9353, 9485, 9623, 7061, 7090, 3656, 9795, 9935 Removing the computer cover

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Removing the computer cover

Attention

Do not open your computer or attempt any repair before reading and understanding the “Important safety information” in the ThinkCentre Safety and Warranty Guide that came with your computer. To obtain a copy of the ThinkCentre Safety and Warranty Guide, go to: http://www.lenovo.com/support

This section provides instructions on how to remove the computer cover.

CAUTION:

Turn off the computer and wait three to five minutes to let the computer cool before removing the computer cover.

To remove the computer cover:

1.Remove any media from the drives, shut down your operating system, and turn off all attached devices and the computer.

2.Unplug all power cords from electrical outlets.

3.Disconnect the cables attached to the computer. This includes power cords, Input/Output (I/O) cables, and any other cables that are connected to the computer. See “Locating connectors on the front of your computer” on page 8 and “Locating connectors on the rear of your computer” on page 9.

4.Remove any locking devices, such as a cable lock that secures the computer cover.

5.If there are thumbscrews that secure the computer cover, remove them.

16User Guide

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Contents ThinkCentre User Guide Page ThinkCentre User Guide Second Edition December Copyright Lenovo 2008 Contents Index Important safety information Vi User Guide Features Product overviewConnectivity Security features Specifications EnvironmentSoftware overview Software provided with your Windows operating systemLenovo ThinkVantage Toolbox Antivirus software Locating connectors on the front of your computer LocationsLocating connectors on the rear of your computer Rear connector locationsConnector Description Locating components Component locationsLocating parts on the system board Locating internal drives Shows the locations of the drive bays User Guide Installing or replacing hardware Installing or replacing hardwareInstalling external options Handling static-sensitive devicesRemoving the computer cover Removing the computer cover Removing and reinstalling the front bezel Installing or replacing a PCI cardOpening the PCI card latch What to do next Installing or replacing a memory module Opening the retaining clipsReplacing the battery Removing the memory moduleInstall a new battery Replacing the power supply assembly Removing the retaining screws for the power supply assemblyReplacing the heat sink and fan assembly Removing the heat sink and fan assembly Replacing the heat sink and fan assembly Replacing the primary hard disk driveRemoving the primary hard disk drive Installing the primary hard disk drive into the bracket Installing the primary hard disk drive and bracket Replacing the secondary hard disk driveRemoving the secondary hard disk drive Installing the secondary hard disk drive into the bracket Installing the secondary hard disk drive and drive cage Replacing the optical driveRemoving the optical drive Replacing the diskette drive or card reader Removing the diskette drive or card reader Replacing the front fan assembly Removing the front fan assemblyReplacing the rear fan assembly Installing the front fan assemblyRemoving the rear fan assembly Replacing the front audio and USB assembly Installing the rear fan assemblyRemoving the front audio and USB assembly Replacing the internal speaker Removing the old internal speakerInstalling a new internal speaker Replacing the keyboardKeyboard connectors Completing the parts replacement Replacing the mouseInstalling security features Reinstalling the computer coverIntegrated cable lock Integrated cable lockPassword protection Erasing lost or forgotten passwords clearing CmosPadlock Installing or replacing hardware User Guide Recovery information Creating and using recovery mediaCreating recovery media Using recovery media Performing backup and recovery operations Performing a backup operationPerforming a recovery operation Using the Rescue and Recovery workspace Creating and using rescue media Creating rescue mediaUsing rescue media Creating and using a recovery repair disketteCreating a recovery repair diskette Using a recovery repair disketteInstalling or reinstalling device drivers Setting a rescue device in the startup sequence Solving recovery problemsUsing the Setup Utility Starting the Setup Utility programViewing and changing settings Using passwordsPassword considerations User PasswordAdministrator Password Setting, changing, and deleting a passwordSelecting a startup device Selecting a temporary startup deviceExiting from the Setup Utility program Selecting or changing the startup device sequenceUsing system programs Updating flashing the Bios from a diskette or discUpdating system programs Updating flashing the Bios from your operating system Recovering from a POST/BIOS update failureUpdating system programs User Guide Troubleshooting and diagnostics Basic troubleshootingDiagnostic programs Lenovo ThinkVantage ToolboxPC-Doctor for Rescue and Recovery Lenovo System ToolboxCleaning the mouse PC-Doctor for DOSOptical mouse Non-optical mouse User Guide Getting information, help, and service Information resourcesOnline Books folder Lenovo ThinkVantage ToolsAccess Help Safety and WarrantyThinkVantage Productivity Center Lenovo WelcomeHelp and service Using the documentation and diagnostic programsCalling for service Using other services Purchasing additional servicesAppendix. Notices Television output notice TrademarksIndex CRUPower Page User Guide Page Part Number 89Y0418
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