Lenovo 804 manual Removing the computer cover

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identify the required connector. Then, use the instructions that come with the option to help you make the connection and install software or device drivers that are required for the option.

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://support.lenovo.com

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, do the following:

1.Remove all media from the drives. Then, turn off all attached devices and the computer.

2.Disconnect all power cords from electrical outlets.

3.Disconnect the power cord, Input/Output cables, and all other cables that are connected to the computer.

4.Remove any locking device that secures the computer cover, such as an integrated cable lock or a padlock. See “Integrated cable lock” on page 42 or “Padlock” on page 43.

5.Remove the two screws that secure the computer cover and slide the computer cover to the rear to remove it.

Figure 6. Removing the computer cover

12ThinkCentre User Guide

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Contents ThinkCentre User Guide Second Edition September Copyright Lenovo 2010 Contents Index Important safety information Iv ThinkCentre User Guide Features Product overviewSecurity features System management featuresInput/Output I/O features ConnectivitySpecifications Preinstalled software programsPreinstalled operating system Lenovo ThinkVantage Tools Software overviewSoftware provided with your Windows operating system ThinkVantage Productivity CenterPassword Manager Product RecoveryThinkVantage Rescue and Recovery ThinkVantage Client Security SolutionLocations Adobe ReaderLocating connectors and parts on the rear of your computer ConnectorLocating components Locating parts on the system boardLocating internal drives System board part locationsDrive bay locations Installing external options Installing or replacing hardwareInstalling or replacing hardware Handling static-sensitive devicesRemoving the computer cover Removing the computer coverRemoving and reinstalling the front bezel Removing the front bezelAccessing the system board components and drives Reinstalling the front bezelInstalling or replacing a PCI card Pivoting the drive bay assembly upwardThinkCentre User Guide Removing the PCI card Installing or replacing a memory module What to do nextRemoving the memory module Replacing the battery Installing the memory moduleReplacing the heat sink and fan assembly Removing the old batteryRemoving the heat sink fan duct Screws that secure the heat sink and fan assembly Installing the heat sink fan duct Replacing the microprocessorAccessing the microprocessor Removing the microprocessor Replacing the power supply assembly Removing the heat sink fan duct Removing the power supply assembly Installing the power supply assembly Replacing the optical drive Removing the optical drive screws Slide the optical drive out of the front of the computer Installing the optical drive Replacing the hard disk drivePivoting the drive bay assembly Removing the hard disk drive Replacing the front fan assembly Installing the hard disk driveRemoving the front fan assembly Installing the front fan assembly Replacing the USB keyboard or mouseCompleting the parts replacement Connecting the USB keyboard or mouseBasic security features Obtaining device driversInstalling an integrated cable lock Integrated cable lockPassword protection Erasing a lost or forgotten password clearing CmosPadlock ThinkCentre User Guide Recovery information Creating and using recovery mediaCreating recovery media Using recovery media Performing backup and recovery operationsOn the Rescue and Recovery menu, click Restore your system Performing a backup operation Performing a recovery operationClick the Restore your system from a backup icon Using the Rescue and Recovery workspace Creating and using a rescue mediumUsing a rescue medium Creating a rescue mediumInstalling or reinstalling device drivers Solving recovery problemsViewing or changing settings Using the Setup Utility programStarting the Setup Utility program Using passwordsAdministrator password Password considerationsPower-on password Setting, changing, or deleting a passwordSelecting a startup device Selecting a temporary startup deviceViewing or changing the startup device sequence Exiting the Setup Utility program Using system programs Updating flashing the Bios from a discUpdating system programs Updating flashing the Bios from your operating system Recovering from a Post and Bios update failureClick Downloads and drivers Updating system programs ThinkCentre User Guide Troubleshooting and diagnostic programs Basic troubleshootingDiagnostic programs PC-Doctor for Rescue and RecoveryLenovo ThinkVantage Toolbox Cleaning an optical mouse PC-Doctor for DOSThinkCentre User Guide Online Books folder Getting information, help, and serviceInformation resources Lenovo ThinkVantage ToolsThinkVantage Productivity Center Access HelpSafety and warranty Lenovo WelcomeHelp and service Using the documentation and diagnostic programsLenovo Support Web site Calling for service Using other servicesPurchasing additional services ThinkCentre User Guide Appendix A. Notices Television output notice European conformance CE mark TrademarksAppendix A. Notices ThinkCentre User Guide Index CRUKeyboard, replacing Lenovo Customer Support Center Set Power-On Password ThinkCentre User Guide Page 71Y8530