Manuals / Lenovo / Computer Equipment / Personal Computer

Lenovo TC A51-8425, TC A51-8424, TC A51-8428, TC S51-8171, TC S51-8173 Cover keylock some models

Models: TC S51-8173 TC A51-8425 TC S51-8171 TC A51-8424 TC S51-8172 TC A51-8428

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Locating controls and connectors on the front of your computer

The following illustration shows locations of the controls and connectors on the front of your computer.

1	Cover keylock (some models)	6	USB connectors (2)
2	CD or DVD drive	7	Microphone connector (line in)
3	Hard disk drive activity indicator	8	Headphone connector (line out)
4	Power-on indicator	9	Diskette drive
5	Power button

10User Guide

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Lenovo TC A51-8425, TC A51-8424, TC A51-8428, TC S51-8171, TC S51-8173, TC S51-8172 manual Cover keylock some models

Contents

User Guide Types 8424, 8425 Types 8171, 8172 Page User Guide Types 8424, 8425 Types 8171, 8172 Page Contents Iv User Guide Important safety information Conditions that require immediate actionGeneral safety guidelines ServicePower cords and power adapters Extension cords and related devices Plugs and outletsBatteries CD and DVD drive safety Additional safety informationHeat and product ventilation To connect To disconnect Lithium battery notice Modem safety informationConnexion Déconnexion Laser compliance statement Consignes de sécurité relatives au modemXii User Guide Overview Information resourcesFeatures Input/output features PowerSecurity features ExpansionIBM preinstalled software Operating systems preinstalled varies by model Available optionsSpecifications Supported operating positions User Guide Installing options Installing external optionsHandling static-sensitive devices Cover keylock some models Locating connectors on the rear of your computer Obtaining device driversOpening the cover Locating components Accessing system board components and drives Identifying parts on the system board Installing memory Installing PCI adapters Removing and replacing the battery What to do nextRemoving and replacing an optical drive Installing security features Removing and replacing a diskette driveIdentifying security locks Integrated security cableUser Guide Password protection To install a rope clipRope clip Cover lockErasing a lost or forgotten password clearing Cmos Closing the cover and connecting the cablesUsing the IBM Setup Utility Starting the IBM Setup Utility programViewing and changing settings Exiting from the IBM Setup Utility programPassword considerations User PasswordAdministrator Password IDE Drive User PasswordIDE Drive Master Password Setting, changing, and deleting a passwordUsing Security Profile by Device Select Security Profile by DeviceAdvanced settings Selecting a startup deviceSelecting a temporary startup device Changing the startup device sequenceAppendix A. Updating POST/BIOS Updating flashing Bios from a disketteUpdating flashing Bios from your operating system Recovering from a POST/BIOS update failure Appendix B. Cleaning the mouse Cleaning an optical mouseCleaning a mouse with a ball User Guide Appendix C. Manual modem commands Basic AT commandsLow speaker volume Set Pulse dial as defaultSet Tone Dial as default Internal speaker on until carrier detectedExtended AT commands MNP/V.42/V.42bis/V.44 commands Fax Class 1 commands Fax Class 2 commandsVoice commands Appendix C. Manual modem commands User Guide Appendix D. Notices Trademarks IBMIndex Special characters Page Page Part Number 19R0474