Lenovo 804 manual Screws that secure the heat sink and fan assembly

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Figure 19. Screws that secure the heat sink and fan assembly

7.Lift the heat sink and fan assembly off the system board.

Notes:

a.You might have to gently twist the heat sink and fan assembly to free it from the microprocessor.

b.When handling the heat sink and fan assembly, do not touch the thermal grease on the bottom of the heat sink and fan assembly.

8.Place the new heat sink and fan assembly on the system board so that the four screws are aligned with the corresponding holes in the system board. Make sure that you properly place the new heat sink and fan assembly so that you can easily connect the new heat sink and fan assembly cable to the microprocessor fan connector on the system board.

9.Follow this sequence to install the four screws to secure the new heat sink and fan assembly, as shown in Screws that secure the heat sink and fan assembly:

a.Partially tighten screw

b.Partially tighten screw

1 , then fully tighten screw

3 , then fully tighten screw

2 , and then fully tighten screw

4 , and then fully tighten screw

1.

3.

10.Connect the new heat sink and fan assembly cable to the microprocessor fan connector on the system board. See “Locating parts on the system board” on page 8.

Chapter 2. Installing or replacing hardware 23

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Contents ThinkCentre User Guide Second Edition September Copyright Lenovo 2010 Contents Index Important safety information Iv ThinkCentre User Guide Product overview FeaturesInput/Output I/O features System management featuresSecurity features ConnectivityPreinstalled operating system SpecificationsPreinstalled software programs Software provided with your Windows operating system Software overviewLenovo ThinkVantage Tools ThinkVantage Productivity CenterThinkVantage Rescue and Recovery Product RecoveryPassword Manager ThinkVantage Client Security SolutionAdobe Reader LocationsConnector Locating connectors and parts on the rear of your computerLocating parts on the system board Locating componentsSystem board part locations Locating internal drivesDrive bay locations Installing or replacing hardware Installing or replacing hardwareInstalling external options Handling static-sensitive devicesRemoving the computer cover Removing the computer coverRemoving the front bezel Removing and reinstalling the front bezelReinstalling the front bezel Accessing the system board components and drivesPivoting the drive bay assembly upward Installing or replacing a PCI cardThinkCentre User Guide Removing the PCI card What to do next Installing or replacing a memory moduleRemoving the memory module Installing the memory module Replacing the batteryRemoving the old battery Replacing the heat sink and fan assemblyRemoving the heat sink fan duct Screws that secure the heat sink and fan assembly Replacing the microprocessor Installing the heat sink fan ductAccessing 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 Replacing the hard disk drive Installing the optical drivePivoting the drive bay assembly Removing the hard disk drive Installing the hard disk drive Replacing the front fan assemblyRemoving the front fan assembly Replacing the USB keyboard or mouse Installing the front fan assemblyConnecting the USB keyboard or mouse Completing the parts replacementObtaining device drivers Basic security featuresIntegrated cable lock Installing an integrated cable lockPadlock Password protectionErasing a lost or forgotten password clearing Cmos ThinkCentre User Guide Creating recovery media Recovery informationCreating and using recovery media On the Rescue and Recovery menu, click Restore your system Using recovery mediaPerforming backup and recovery operations Click the Restore your system from a backup icon Performing a backup operationPerforming a recovery operation Creating and using a rescue medium Using the Rescue and Recovery workspaceCreating a rescue medium Using a rescue mediumSolving recovery problems Installing or reinstalling device driversStarting the Setup Utility program Using the Setup Utility programViewing or changing settings Using passwordsPower-on password Password considerationsAdministrator password Setting, changing, or deleting a passwordViewing or changing the startup device sequence Selecting a startup deviceSelecting a temporary startup device Exiting the Setup Utility program Updating system programs Using system programsUpdating flashing the Bios from a disc Click Downloads and drivers Updating flashing the Bios from your operating systemRecovering from a Post and Bios update failure Updating system programs ThinkCentre User Guide Basic troubleshooting Troubleshooting and diagnostic programsLenovo ThinkVantage Toolbox Diagnostic programsPC-Doctor for Rescue and Recovery PC-Doctor for DOS Cleaning an optical mouseThinkCentre User Guide Information resources Getting information, help, and serviceOnline Books folder Lenovo ThinkVantage ToolsSafety and warranty Access HelpThinkVantage Productivity Center Lenovo WelcomeLenovo Support Web site Help and serviceUsing the documentation and diagnostic programs Using other services Calling for servicePurchasing additional services ThinkCentre User Guide Appendix A. Notices European conformance CE mark Trademarks Television output noticeAppendix A. Notices ThinkCentre User Guide CRU IndexKeyboard, replacing Lenovo Customer Support Center Set Power-On Password ThinkCentre User Guide Page 71Y8530