Manuals / Lenovo / Computer Equipment / Personal Computer

Lenovo 6139, 7348, 8338, 8820, 7637, 7479, 7626 Lift the failing heat sink off the system board, Notes

Models: 9961 7187 6136 7345 7629 7359 7356 7626 7479 7637 8820 8338 7348 6139

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4.Lift the failing heat sink off the system board.

3.Remove the four screws that secure the heat sink to the system board.

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.

Figure 16. Removing the heat sink

4.Lift the failing heat sink off the system board.

Notes:

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

b.Do not touch the thermal grease while handling the heat sink.

5.Position the new heat sink on the system board so that the four screws are aligned with the holes on the system board.

6.Alternate tightening each screw a small and equal amount until the heat sink and fan assembly is secured to the system board. Do not over-tighten the screws.

7.Go to “Completing the parts replacement” on page 30.

20User Guide

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Lenovo 6139, 7348, 8338, 8820, 7637, 7479, 7626, 7356, 7359, 7629, 7345, 6136 Lift the failing heat sink off the system board, Notes

Contents

Page Page ThinkCentre User Guide Second Edition May Copyright Lenovo 2009. All rights reservedContents ivUser Guide Important safety information viUser Guide Features Chapter 1. Product overviewNote: Use only computer parts provided by Lenovo System informationSystem management features Input/Output featuresVideo subsystem Audio subsystemPower Security featuresPreinstalled software Operating system, preinstalledSpecifications DimensionsWeight EnvironmentSoftware provided by Lenovo Software overviewLenovo System Toolbox Locating connectors on the front of your computer LocationsPC-Doctorfor Windows PE Adobe ReaderLocating connectors on the rear of your computer Figure 2. Rear connector locationsConnector DescriptionLocating components 5 Heat sink 6 Battery 7 Memory slotsFigure 3. Component locations 1 Optical drive 2 Front bezelLocating parts on the system board Handling static-sensitivedevices Installing options and replacing hardwareNote: Use only computer parts provided by Lenovo Installing external options Opening the computer coverInstalling or replacing a memory module What to do next Figure 7. Installing a memory moduleFigure 6. Removing the memory module Replacing the hard disk drive Replacing the optical drive Figure 10. Removing the front bezel Figure 11. Removing the optical driveReplacing the battery Replacing the heat sink 4.Lift the failing heat sink off the system board NotesReplacing the microprocessor Figure 18. Removing the microprocessor Notes22User Guide Replacing the adapter card 9.Close the adapter card retainer Replacing the front audio and USB assembly Replacing the internal speakerTo replace the front audio and USB assembly Replacing the AC power adapter Figure 24. Connecting the AC power adapter 28User GuideReplacing the keyboard Replacing the mouseCompleting the parts replacement 3.Close the computer cover as shown Installing security features Obtaining device driversPassword protection Integrated cable lockWhat to do next Figure 29. Integrated cable lockErasing lost or forgotten passwords clearing CMOS Chapter 3. Recovery information Creating and using Product Recovery discsPerforming backup and recovery operations Using the Rescue and Recovery workspace Notes Creating and using rescue mediaTo create rescue media, do the following Creating and using a Recovery Repair diskette To use rescue media, do one of the followingRecovering or installing device drivers Setting a rescue device in the startup sequence Solving recovery problems42User Guide Chapter 4. Using the Setup Utility Starting the Setup Utility programViewing and changing settings Using passwordsPassword considerations Power-OnPasswordPrivileged Access Password Hard Disk User PasswordSelecting a startup device Enabling or disabling a deviceSelecting a temporary startup device Advanced settings Exiting from the Setup Utility programSelecting or changing the startup device sequence 46User GuideUpdating flashing BIOS from a disc Using system programsChapter 5. Updating system programs Recovering from a POST/BIOS update failure Updating flashing BIOS from your operating system→Continue → Downloads and drivers 13.Reconnect any cables that were disconnected 50User Guide Chapter 6. Troubleshooting and diagnostics Basic troubleshootingAction SymptomThe keyboard does not work Diagnostic programs Lenovo System ToolboxPC-Doctorfor Windows PE Chapter 6. Troubleshooting and diagnosticsCleaning the mouse Creating a diagnostic CD/DVD imageRunning diagnostics from the disc PC-Doctorfor DOSNon-opticalmouse 11.Reconnect the mouse cable to the computer Chapter 7. Getting information, help, and service Information resourcesOnline Books folder ThinkVantage Productivity CenterSafety and Warranty Access HelpLenovo Welcome Using the documentation and diagnostic programs Help and serviceCalling for service Using other services Purchasing additional servicesAppendix. Notices Lenovo United States, Inc1009 Think Place - Building One Morrisville, NC U.S.A Attention: Lenovo Director of LicensingTelevision output notice TrademarksIndex A Page Page 66User Guide Page Part Number: 53Y9936 Printed in USA 1P P/N: 53Y9936