Lenovo TC S51-8172, TC A51-8425, TC A51-8424, TC A51-8428 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 that are IBM-installed or that you can install later.

The following illustration shows the locations of parts on the system board.

1	Fan connectors (2)	8	Diskette drive connector
2	Memory DIMM connectors (2)	9	Power button and front LED assembly
			connector
3	SATA IDE hard disk drive	10	Power supply connector
	connectors (2)
4	Riser connector	11	PATA Primary IDE connector (hard disk
			drive and CD-ROM drive)
5	CMOS Battery	12	Power supply connector
6	Clear CMOS/BIOS recovery	13	Microprocessor
	jumper
7	Internal speaker connector

Chapter 2. Installing options 15

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Contents User Guide Types 8424, 8425 Types 8171, 8172 Page User Guide Types 8424, 8425 Types 8171, 8172 Page Contents Iv User Guide Conditions that require immediate action Important safety informationPower cords and power adapters General safety guidelinesService Batteries Extension cords and related devicesPlugs and outlets Heat and product ventilation CD and DVD drive safetyAdditional safety information To connect To disconnect Connexion Déconnexion Lithium battery noticeModem safety information Consignes de sécurité relatives au modem Laser compliance statementXii User Guide Information resources OverviewFeatures Power Input/output featuresSecurity features ExpansionIBM preinstalled software Available options Operating systems preinstalled varies by modelSpecifications Supported operating positions User Guide Handling static-sensitive devices Installing optionsInstalling external options Cover keylock some models Obtaining device drivers Locating connectors on the rear of your computerOpening the cover Locating components Accessing system board components and drives Identifying parts on the system board Installing memory Installing PCI adapters What to do next Removing and replacing the batteryRemoving and replacing an optical drive Removing and replacing a diskette drive Installing security featuresIntegrated security cable Identifying security locksUser Guide To install a rope clip Password protectionRope clip Cover lockClosing the cover and connecting the cables Erasing a lost or forgotten password clearing CmosStarting the IBM Setup Utility program Using the IBM Setup UtilityViewing and changing settings Exiting from the IBM Setup Utility programUser Password Password considerationsAdministrator Password IDE Drive User PasswordSetting, changing, and deleting a password IDE Drive Master PasswordUsing Security Profile by Device Select Security Profile by DeviceSelecting a startup device Advanced settingsSelecting a temporary startup device Changing the startup device sequenceUpdating flashing Bios from your operating system Appendix A. Updating POST/BIOSUpdating flashing Bios from a diskette Recovering from a POST/BIOS update failure Cleaning a mouse with a ball Appendix B. Cleaning the mouseCleaning an optical mouse User Guide Basic AT commands Appendix C. Manual modem commandsSet Pulse dial as default Low speaker volumeSet Tone Dial as default Internal speaker on until carrier detectedExtended AT commands MNP/V.42/V.42bis/V.44 commands Fax Class 2 commands Fax Class 1 commandsVoice commands Appendix C. Manual modem commands User Guide Appendix D. Notices IBM TrademarksIndex Special characters Page Page Part Number 19R0474