Lenovo 8142, 8426, 8421, 8145, 8420, 8141, 8095 Heat and product ventilation, CD and DVD drive safety

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Heat and product ventilation

Computers generate heat when turned on and when batteries are charging. Notebook PCs can generate a significant amount of heat due to their compact size. Always follow these basic precautions:

vDo not leave the base of your computer in contact with your lap or any part of your body for an extended period when the computer is functioning or when the battery is charging. Your computer produces some heat during normal operation. Extended contact with the body could cause discomfort or, potentially, a skin burn.

vDo not operate your computer or charge the battery near flammable materials or in explosive environments.

vVentilation slots, fans and/or heat sinks are provided with the product for safety, comfort, and reliable operation. These features might inadvertently become blocked by placing the product on a bed, sofa, carpet, or other flexible surface. Never block, cover or disable these features.

You should inspect your desktop computer for dust accumulation at least once every three months. Before inspecting your computer, turn off the power and unplug the computer’s power cord from the electrical outlet; then remove any dust from vents and perforations in the bezel. If you notice external dust accumulation, you should also examine and remove dust from the inside of the computer including heat sink inlet fins, power supply vents, and fans. Always turn off and unplug the computer before opening the cover. If possible, avoid operating your computer within 2 feet of high-traffic areas. If you must operate your computer in or near a high-traffic area, you should inspect and, if necessary, clean your computer more frequently.

For your safety and to maintain optimum computer performance, always follow these basic precautions with your desktop computer:

vKeep the cover closed whenever the computer is plugged in.

vRegularly inspect the outside of the computer for dust accumulation.

vRemove dust from vents and any perforations in the bezel. More frequent cleanings might be required for computers in dusty or high-traffic areas.

vDo not block or restrict airflow into the front of the computer.

vDo not block the airflow vents on the back of the computer.

vDo not store or operate your computer inside furniture, as this might increase the risk of overheating.

vAirflow temperatures into the computer should not exceed 35° C (95° F).

vDo not use non-ThinkCentre air filtration devices.

CD and DVD drive safety

CD and DVD drives spin discs at a high speed. If a CD or DVD is cracked or otherwise physically damaged, it is possible for the disc to break apart or even shatter when the CD drive is in use. To protect against possible injury due to this situation, and to reduce the risk of damage to your machine, do the following:

vAlways store CD/DVD discs in their original packaging

vAlways store CD/DVD discs out of direct sunlight and away from direct heat sources

vRemove CD/DVD discs from the computer when not in use

vDo not bend or flex CD/DVD discs, or force them into the computer or their packaging

Important safety information

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Contents User Guide Types 8095, 8096, 8141 Types 8145, 8420, 8421 Page User Guide Types 8095, 8096, 8141 Types 8145, 8420, 8421 Page Contents Iv User Guide Conditions that require immediate action Important safety informationService General safety guidelinesExtension cords and related devices Power cords and power adaptersBatteries Plugs and outletsHeat and product ventilation CD and DVD drive safetyTo connect To disconnect Additional safety informationLithium battery notice Laser compliance statement Modem safety informationPower supply statement Information resources OverviewXiv User Guide Features Installing optionsMemory Operating systems, preinstalled varies by model type Specifications Handling static-sensitive devices Available optionsTools required Installing external options Locating the connectors on the front of your computer Locating the connectors on the rear of your computer Obtaining device drivers Connector DescriptionRemoving the cover Identifying parts on the system board Locating componentsInstalling memory Installing options What to do next Installing adaptersWhat to do next Drive specifications Installing internal drivesInstalling a drive User Guide Connecting the first optical drive Connecting a serial ATA hard disk drive Installing security featuresPadlock loop Password protectionChanging the battery User Guide Replacing the cover and connecting the cables Erasing a lost or forgotten password clearing CmosUser Guide Using passwords Using the Setup Utility programStarting the Setup Utility program Viewing and changing settingsIDE Drive Master Password User passwordAdministrator password IDE Drive User PasswordSelecting a startup device Setting, changing, and deleting a passwordUsing Security Profile by Device Changing the startup sequence Exiting from the Setup Utility programSelecting a temporary startup device System programs Updating flashing Bios from a disketteUpdating flashing Bios from your operating system Appendix A. Updating system programsClick Continue Click Downloads and drivers Recovering from a POST/BIOS update failureCleaning a mouse with a ball Appendix B. Cleaning the mouseCleaning an optical mouse User Guide Basic AT commands Appendix C. Manual modem commandsInternal speaker on until carrier detected Low speaker volumeSet Pulse dial as default Set Tone Dial as defaultExtended 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 Trademarks Television output noticeIndex Page Page Part Number 19R0462
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