Lenovo 3000 J Series manual External devices, Batteries, Heat and product ventilation

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Be sure that the power outlet you are using is properly wired, easily accessible, and located close to the equipment. Do not fully extend power cords in a way that will stress the cords.

Be sure that the power outlet provides the correct voltage and current for the product you are installing.

Carefully connect and disconnect the equipment from the electrical outlet.

External devices

Do not connect or disconnect any external device cables other than USB and 1394 cables while the computer power is on; otherwise, you might damage your computer. To avoid possible damage to attached devices, wait at least five seconds after the computer is shut down to disconnect external devices.

Batteries

All personal computers manufactured by Lenovo contain a non-rechargeable coin cell battery to provide power to the system clock. In addition, many mobile products, such as notebook computers, utilize a rechargeable battery pack to provide system power when in portable mode. Batteries supplied by Lenovo for use with your product have been tested for compatibility and should only be replaced with approved parts.

Never attempt to open or service any battery. Do not crush, puncture, or incinerate batteries or short circuit the metal contacts. Do not expose the battery to water or other liquids. Only recharge the battery pack strictly according to instructions included in the product documentation.

Battery abuse or mishandling can cause the battery to overheat, which can cause gasses or flame to “vent” from the battery pack or coin cell. If your battery is damaged, or if you notice any discharge from your battery or the buildup of foreign materials on the battery leads, stop using the battery and obtain a replacement from the battery manufacturer.

Batteries can degrade when they are left unused for long periods of time. For some rechargeable batteries (particularly Lithium Ion batteries), leaving a battery unused in a discharged state could increase the risk of a battery short circuit, which could shorten the life of the battery and can also pose a safety hazard. Do not let rechargeable Lithium-Ion batteries completely discharge or store these batteries in a discharged state.

Heat and product ventilation

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

vDo not leave the base of your notebook 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

xUser Guide

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Contents User Guide Lenovo 3000 J Series Page Lenovo 3000 J Series Page Contents Getting information, help Important safety information Conditions that require immediate actionGeneral safety guidelines Service and upgradesPower cords and power adapters Static electricity preventionViii User Guide Voltage-selection switch Extension cords and related devicesPlugs and outlets External devices BatteriesHeat and product ventilation Operating environment Electrical current safety information Lithium battery noticeTo connect To disconnect Modem safety information Laser compliance statementPower supply statement Data safetyCleaning and maintenance Additional safety informationIntroduction Xvi 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 1394 User Guide Turning on power Finishing the software installationCompleting important tasks Installing other operating systems Updating your operating systemUpdating your antivirus software Shutting down the computerInstalling options FeaturesMemory Input/output features Available options Specifications Tools requiredHandling static-sensitive devices Installing external options Locating the connectors on the front of your computer Locating the connectors on the rear of your computer Connector Description Obtaining device drivers Removing the cover Locating components Identifying parts on the system boardUser Guide Installing options Installing memory What to do nextInstalling adapters Secure the adapter with the screw as shown Installing internal drives Drive specificationsUser Guide Installing a drive User Guide Installing options Connecting the first CD drive or DVD drive Installing security features Connecting a serial ATA hard disk drivePassword protection Changing the batteryPadlock loop Installing options Erasing a lost or forgotten password clearing Cmos Replacing the cover and connecting the cables User Guide Recovering software Creating and using the Product Recovery discPerforming backup and recovery operations Using the Rescue and Recovery workspace Creating and using rescue media Creating and using a Recovery Repair diskette To create rescue media, do the followingRecovering or installing device drivers Setting a rescue device in the startup sequence Solving recovery problemsUser Guide Using the Setup Utility Starting the Setup Utility programViewing and changing settings Using passwordsPassword considerations User PasswordAdministrator Password Setting, changing, and deleting a passwordUsing Security Profile by Device Selecting a startup deviceSelecting a temporary startup device Advanced settings Exiting from the Setup Utility programChanging the startup device sequence Using system programs Updating flashing Bios from a disketteUpdating system programs User Guide Troubleshooting and diagnostics Basic troubleshootingSymptom Action Diagnostic programs PC-Doctor for Windows PC-Doctor for DOSCreating diagnostic diskettes Cleaning the mouse PC-Doctor for Windows PEOptical mouse Non-optical mouse Troubleshooting and diagnostics User Guide Getting information, help, and service Information resourcesOnline Books folder Lenovo CareAccess Help Warranty and safetyHelp and service Using the documentation and diagnostic programsCalling for service Using other services Purchasing additional servicesAppendix A. 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 A. Manual modem commands User Guide Appendix B. Notices Television output notice TrademarksIndex 14, 22, 23 Page Part Number
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