Lenovo 804 manual Removing the heat sink fan duct

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To replace the heat sink and fan assembly, do the following:

1.Remove all media from the drives and turn off all attached devices and the computer. Then, disconnect all power cords from electrical outlets and disconnect all cables that are connected to the computer.

2.Remove the computer cover. See “Removing the computer cover” on page 12.

3.Remove the front bezel. See “Removing and reinstalling the front bezel” on page 13.

4.Pivot the drive bay assembly upward. Remove the two screws that secure the heat sink fan duct and then lift the heat sink fan duct up to remove it from the chassis.

Figure 18. Removing the heat sink fan duct

5.Disconnect the heat sink and fan assembly cable from the microprocessor fan connector on the system board. See “Locating parts on the system board” on page 8.

6.Follow this sequence to remove the four screws that secure the heat sink and fan assembly to the system board:

a.Partially remove screw

b.Partially remove screw

1 , then fully remove screw

3 , then fully remove screw

2 , and then fully remove screw

4 , and then fully remove screw

1.

3.

Note: Carefully remove the four screws from the system board to avoid any possible damage to the system board. The four screws cannot be removed from the heat sink and fan assembly.

22ThinkCentre 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 overviewSystem management features Input/Output I/O featuresSecurity features ConnectivityPreinstalled software programs SpecificationsPreinstalled operating system Software overview Software provided with your Windows operating systemLenovo ThinkVantage Tools ThinkVantage Productivity CenterProduct Recovery ThinkVantage Rescue and RecoveryPassword Manager 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 or replacing hardware Installing or replacing hardwareInstalling external options 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 lockErasing a lost or forgotten password clearing Cmos Password protectionPadlock ThinkCentre User Guide Creating and using recovery media Recovery informationCreating recovery media Performing backup and recovery operations Using recovery mediaOn the Rescue and Recovery menu, click Restore your system Performing a recovery operation Performing a backup 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 problemsUsing the Setup Utility program Starting the Setup Utility programViewing or changing settings Using passwordsPassword considerations Power-on passwordAdministrator password Setting, changing, or deleting a passwordSelecting a temporary startup device Selecting a startup deviceViewing or changing the startup device sequence Exiting the Setup Utility program Updating flashing the Bios from a disc Using system programsUpdating system programs Recovering from a Post and Bios update failure Updating flashing the Bios from your operating systemClick Downloads and drivers Updating system programs ThinkCentre User Guide Troubleshooting and diagnostic programs Basic troubleshootingPC-Doctor for Rescue and Recovery Diagnostic programsLenovo ThinkVantage Toolbox Cleaning an optical mouse PC-Doctor for DOSThinkCentre User Guide Getting information, help, and service Information resourcesOnline Books folder Lenovo ThinkVantage ToolsAccess Help Safety and warrantyThinkVantage Productivity Center Lenovo WelcomeUsing the documentation and diagnostic programs Help and serviceLenovo 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