Lenovo 4155, 4158, 4218 manual Air circulation, Electrical outlets and cable lengths

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Where it is impossible to avoid reflections or to adjust the lighting, an antiglare filter placed over the screen might be helpful. However, these filters might affect the clarity of the image on the screen; try them only after you have exhausted other methods of reducing glare.

Dust buildup compounds problems associated with glare. Remember to clean your monitor screen periodically using a soft cloth as directed in your monitor documentation.

Air circulation

Your computer and monitor produce heat. The computer has a fan that pulls in fresh air and forces out hot air. The monitor lets hot air escape through vents. Blocking the air vents can cause overheating, which might result in a malfunction or damage. Place the computer and monitor so that nothing blocks the air vents; usually, 51 mm (2 inches) of air space is sufficient. Also, make sure the vented air is not blowing on people.

Electrical outlets and cable lengths

The location of electrical outlets, the length of power cords and cables that connect to the monitor, printer, and other devices might determine the final placement of your computer.

When arranging your workspace:

vAvoid the use of extension cords. When possible, plug the computer power cord directly into an electrical outlet.

vKeep power cords and cables neatly routed away from walkways and other areas where they might get kicked accidentally.

For more information about power cords, refer to the ThinkStation Safety and

Warranty Guide that came with your computer.

4User Guide

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Contents ThinkStation User Guide Page ThinkStation User Guide Second Edition October Copyright Lenovo Contents Appendix B. System memory speed Appendix C. Notices Introduction Vi User Guide Important safety information User Guide Arranging your workspace ComfortGlare and lighting Air circulation Electrical outlets and cable lengthsSetting up your computer Connecting your computerUser Guide Setting up your computer User Guide Setting up your computer If you have powered speakers with an ac power adapter 1394 Turning on computer power Finishing the software installationCompleting important tasks Installing other operating systems Installing external optionsUpdating your operating system Updating your antivirus softwareInstalling the computer on a rack shelf FeaturesConnectivity Security features Specifications DimensionsUser Guide Software overview Software provided with your Windows operating systemSoftware provided by Lenovo PC-Doctor for Rescue and Recovery Lenovo ThinkVantage ToolboxLenovo System Toolbox Adobe ReaderUsing the Setup Utility Starting the Setup Utility programViewing and changing settings Using passwordsPassword considerations User PasswordAdministrator Password Setting, changing, and deleting a passwordEnabling or disabling a device Selecting a startup deviceSelecting a temporary startup device Advanced settings Exiting from the Setup Utility programSelecting or changing the startup device sequence Installing hard disk drives and configuring RAID Installing Sata or SAS hard disk drivesFrom the RAID Config menu, select Create array Configuring the Marvell Bios Setup to delete an array From the RAID Config menu, select Delete arrayUser Guide Using system programs Updating flashing Bios from a discUpdating system programs Updating flashing Bios from your operating system Recovering from a POST/BIOS update failureUpdating system programs User Guide Troubleshooting and diagnostics Basic troubleshootingDiagnostic programs Troubleshooting and diagnostics Creating a diagnostic disc PC-Doctor for DOSCleaning the mouse Optical mouseNon-optical mouse 2 Ball 3 Plastic rollers 4 Ball cage Recovery information Creating and using recovery mediaCreating recovery media Using recovery media Performing backup and recovery operationsPerforming a backup operation Performing a recovery operationUsing the Rescue and Recovery workspace Creating and using rescue media Creating rescue mediaUsing rescue media Creating and using a recovery repair disketteCreating a recovery repair diskette Using a recovery repair diskette Installing or reinstalling device driversSetting a rescue device in the startup sequence Solving recovery problemsGetting information, help, and service Information resourcesOnline Books folder Lenovo ThinkVantage ToolsSafety and Warranty Help and serviceUsing the documentation and diagnostic programs Calling for serviceUsing other services Purchasing additional services Appendix A. Manual modem commands Basic AT commandsLow speaker volume Extended AT commands Enable RTS/CTS hardware flow controlMNP/V.42/V.42bis/V.44 commands +MS=?Fax Class 1 commands Fax Class 2 commandsVoice commands Appendix A. Manual modem commands User Guide Appendix B. System memory speed User Guide Appendix C. Notices Television output notice European conformance CE mark TrademarksIndex Page Page User Guide Page Part Number 53Y4327