Lenovo 628323U manual Troubleshooting computer problems, Taking care of your computer

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Chapter 5. Troubleshooting computer problems

When you experience a problem, refer to the corresponding sections in this topic to try to solve the problem by yourself.

•“Computer stops responding” on page 43

•“Spills on the keyboard” on page 44

•“Memory module problems” on page 44

•“Networking problems” on page 44

•“Problems with the keyboard and other pointing devices” on page 45

•“Problems with the display and multimedia devices” on page 46

•“Battery and power problems” on page 48

Taking care of your computer

Although your computer is designed to function reliably in normal work environments, you need to use common sense in handling it. By following these important tips, you will get the most use and enjoyment out of your computer.

Be careful about where and how you work

•Store packing materials safely out of the reach of children to prevent the risk of suffocation from plastic bags.

•Keep your computer away from magnets, activated cellular phones, electrical appliances, or speakers (more than 13 cm or 5 inches).

•Avoid subjecting your computer to extreme temperatures (below 5°C/41°F or above 35°C/95°F).

•Some appliances, such as certain portable desktop fans or air purifiers, can produce negative ions. If a computer is close to such an appliance, and is exposed for an extended time to air containing negative ions, it might become electrostatically charged. Such a charge might be discharged through your hands when you touch the keyboard or other parts of the computer, or through connectors on I/O devices connected to it. Even though this kind of electrostatic discharge (ESD) is the opposite of a discharge from your body or clothing to the computer, it poses the same risk of a computer malfunction.

Your computer is designed and manufactured to minimize any effects of electrostatic charge. An electrostatic charge above a certain limit, however, can increase the risk of ESD. Therefore, when using the computer close to an appliance that can produce negative ions, give special attention to the following:

•Avoid directly exposing your computer to the air from an appliance that can produce negative ions.

•Keep your computer and peripherals as far as possible from such an appliance.

•Wherever possible, ground your computer to facilitate safe electrostatic discharge.

Note: Not all such appliances cause a significant electrostatic charge.

Be gentle with your computer

•Avoid placing any objects (including paper) between the display and the keyboard or the palm rest.

•Your computer display is designed to be opened and used at an angle slightly greater than 90 degrees. Do not open the display beyond 180 degrees, as this might damage the computer hinge.

•Do not turn your computer over while the ac power adapter is plugged in. This could break the adapter plug.

© Copyright Lenovo 2013

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Contents User Guide Safety, Warranty, and Setup Guide Regulatory Notice Contents Appendix B. Weee and recycling Statements Protect the cables from being damaged Read this firstProtect yourself from the heat that your computer generates Prevent your computer from getting wetCarry your computer carefully Important safety informationConditions that require immediate action Handle your computer gentlyService and upgrades Safety guidelinesExtension cords and related devices Power cords and power adaptersPlugs and outlets Power supply statementExternal devices Rechargeable battery notice General battery noticeHeat and product ventilation Electrical current safety informationLiquid crystal display LCD notice Using headphones or earphonesAdditional safety information Xii User Guide Camera Locating computer controls, connectors, and indicatorsProduct overview Front viewMicrophone System status indicatorPower button Right-side viewMedia card reader slot USB 2.0 connectorPower status indicator Ac power connectorLeft-side view VGA connectorUSB 3.0 connectors Ethernet connectorSystem status indicators Status indicatorsBottom view User Guide Machine type and model label Wireless status indicatorPower status indicator Locating important product informationFCC ID and IC Certification number label Specifications FeaturesOperating environment Power source ac power adapterBattery pack Battery lifeRegistering your computer Using your computerFrequently asked questions How can I use the battery power more effectively?How do I give presentations or attach an external monitor? Special keysHow do I attach or replace a device? Using the TrackPoint pointing device Using the UltraNav pointing deviceChanging the cap Using the touch padCustomizing the touch pad Connecting the ac power adapter Power managementChecking the battery status Using the ac power adapterHandling the battery Charging the batteryMaximizing the battery life Power-saving modesUsing your computer Wireless LAN connection status Connecting to a wireless LANEstablishing wireless LAN connections Go to Settings Internet connection Wi-Fi networkAttaching an external monitor Connecting a projector or an external monitorTips for using the wireless LAN feature Connecting an external monitorUsing the camera Using audio featuresUsing a flash media card Removing a flash media card Inserting a flash media cardUser Guide You and your computer Accessibility and comfortErgonomic information Comfort Accessibility informationAssistive technologies Travel accessoriesTraveling with your computer Travel tipsUser Guide Replacing devices Replacing the batteryStatic electricity prevention User Guide Before you start, print these instructions User Guide Replacing devices Replacing a memory module Replacing devices Replacing the keyboard Replacing devices Installing the keyboard Replacing devices User Guide Replacing devices User Guide Be gentle with your computer Troubleshooting computer problemsBe careful about where and how you work Taking care of your computerCleaning the cover of your computer Computer stops responding Cleaning your computer displaySpills on the keyboard Memory module problemsNetworking problems Ethernet problemsSolution Wireless LAN problemProblems with the keyboard and other pointing devices An UltraNav pointing device problemProblems with the display and multimedia devices Keyboard problemsComputer screen problems Audio problems External monitor problemsBattery problems Battery and power problemsPower problems Sleep problems Power button problemUser Guide Getting support Getting help and serviceBefore you contact Lenovo Calling Lenovo Lenovo Support Web siteTelephone numbers Finding ThinkPad options Purchasing additional servicesUser Guide Appendix A. Regulatory information Wireless related informationLocation of the UltraConnect wireless antennas Wireless interoperabilityFederal Communications Commission Declaration of Conformity Locating wireless regulatory noticesExport classification notice Electronic emission noticesAppendix A. Regulatory information User Guide Important Weee information Appendix B. Weee and recycling statementsUser Guide Appendix C. Energy Star model information Power plan Energy Saver settings when plugged into ac powerUser Guide Appendix D. Notices Trademarks Page Part Number Printed 1P P/N
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