Lenovo 8336 manual Identifying parts on the system board

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Identifying parts on the system board

The system board (sometimes called the planar or motherboard) is the main circuit board in your computer. It provides basic computer functions and supports a variety of devices.

Figure 4 shows the location of parts on the system board.

Figure 4. Locating parts on the system board

1 Microprocessor

2 Clear CMOS/Recovery jumper 3 Thermal sensor connector

4 Battery

5 Memory slots (2)

6 Internal speaker connector 7 Serial (COM) connector 8 SATA connectors (2)

9 PCI slot

10 Front USB connector 2

11 Intrusion switch connector/Cover

presence switch connector

12 Front I/O and LED/Switch header 13 eSATA connector

14 Internal power distribution connector 15 Fan connector

Chapter 2. Overview 9

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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 Locations Controls and connectorsLocating the rear connectors Locating connectors on the rear of your computerConnector Description Locating components Locating componentsShows the location of parts on the system board Identifying parts on the system boardHardware Installation and Replacement Guide Opening the cover Installing options and replacing hardwareInstalling external options Installing memory Installing internal optionsInstalling a memory module Replacing the batteryInstalling a new battery Replacing the front audio and USB assemblyRemoving the front bezel Removing the heat sink Replacing the heat sinkRemoving the microprocessor Replacing the microprocessorLift the microprocessor straight up and out of the socket Removing the system fan assembly Replacing the system fan assemblyInstalling the short rubber mounts Removing the hard disk drive Replacing a hard disk driveReplacing an optical drive Installing the hard disk drive into the bracketRemoving the optical drive Replacing the optical drive Replacing a memory moduleReplacing the adapter card Installing the new memory moduleReleasing the system board Connecting the AC power adapter Replacing the AC power adapterRemoving the internal speaker Replacing the internal speakerReplacing the keyboard Keyboard connectorsReplacing a mouse Replacing the mouseRouting the cables Completing the parts replacementClosing the computer cover Obtaining device driversIntegrated cable lock Security featuresPassword protection Erasing a lost or forgotten password clearing Cmos Appendix. Notices Trademarks Television output noticePage Part Number 46R4750