Lenovo 9853, 9784, 9489, 9703, 9358, 9481, 9351 Replacing the screws to the heat sink and fan assembly

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6.Position the new heat sink on the plastic retention bracket so that the four screws are aligned with the posts on the system board. Tighten the four screws1to the heat sink and fan assembly to the system board.

Figure 31. Replacing the screws to the heat sink and fan assembly

7.Connect the microprocessor fan cable to the microprocessor fan connector on the system board.

8.Go to Chapter 4, “Completing the parts replacement,” on page 33.

26Hardware Installation and Replacement Guide

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Contents

ThinkCentre Hardware Installation and Replacement Guide Page ThinkCentre Hardware Installation and Replacement Guide Page Contents Iv Hardware Installation and Replacement Guide Figures Vi Hardware Installation and Replacement Guide Important safety information Hardware Installation and Replacement Guide Additional information resources OverviewHandling static-sensitive devices Controls and connectors LocationsLocating connectors on the rear of your computer Shows the location of connectors on the rear of the computerConnector Description Locating components Will help you locate the various components in your computerLocating parts on the system board Shows the locations of parts on the system boardTools required Installing options and replacing hardwareInstalling external options Removing the coverAccessing system board components and drives Removing the coverRemoving the PCI adapter Installing internal options Installing memoryInstalling PCI adapters What to do nextOpening the adapter latch Installing internal drives Drive specificationsFollowing illustration shows the locations of the drive bays Installing a drive in bay Connecting drives Installing a diskette drive in bay Replacing the battery Battery removalReplacing the hard disk drive Removing the hard disk drive Aligning the pins with the holes in the hard disk drive Replacing the diskette drive Removing the diskette driveReplacing an optical drive Removing the optical driveReplacing the heat sink and fan assembly Removing the heat sink and fan assemblyReplacing the screws to the heat sink and fan assembly Replacing the system fan assembly Removing the system fan assemblyReplacing a memory module Removing the memory moduleReplacing a PCI adapter Removing the adapterReplacing a keyboard Replacing a mouseMouse connectors Hardware Installation and Replacement Guide Completing the parts replacement Replacing the coverObtaining device drivers Security features Integrated cable lockErasing a lost or forgotten password clearing Cmos Password protectionPadlock Security features Hardware Installation and Replacement Guide Appendix. Notices Television output notice TrademarksPage Part Number 45C6431