Lenovo TC A51-8428, TC A51-8425, TC A51-8424, TC S51-8171, TC S51-8173, TC S51-8172 Trademarks, Ibm

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Trademarks

The following terms are trademarks of the IBM Corporation in the United States or other countries or both:

IBM

PS/2

ThinkCentre

Wake on LAN

Intel, Celeron, and Pentium are trademarks of Intel Corporation in the United

States, other countries, or both.

Microsoft, Windows, and Windows NT are trademarks of Microsoft Corporation in the United States, other countries, or both.

Other company, product, and service names may be trademarks or service marks of others.

42User Guide

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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 Important safety information Conditions that require immediate actionPower 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 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 Handling static-sensitive devices Installing optionsInstalling external options 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 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 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