Lenovo 628323U manual Wireless LAN problem, Problems with the keyboard and other pointing devices

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If you configured the adapter for full duplex, make sure that the switch port also is configured for full duplex. Setting the wrong duplex mode can degrade performance, cause data loss, or result in lost connections.

–You have installed all networking software that is necessary for your network environment. Check with your LAN administrator for the necessary networking software.

•Problem: The adapter stops working for no apparent reason.

Solution: The network driver files might be corrupt or missing. Update the driver by referring to the above solution for the procedure to make sure that the correct device driver is installed.

•Problem: If your computer is a Gigabit Ethernet model and you use a speed of 1000 Mbps, the connection fails or errors occur.

Solution:

–Use Category 5 wiring and make sure that the network cable is securely connected.

–Connect to a 1000 BASE-T hub/switch (not 1000 BASE-X).

•Problem: If your computer is a Gigabit Ethernet model, it cannot connect to the network at 1000 Mbps. Instead, it connects at 100 Mbps.

Solution:

–Try another cable.

–Ensure that the link partner is set to auto-negotiate.

–Ensure that the switch is 802.3ab-compliant (gigabit over copper).

A wireless LAN problem

Problem: You cannot connect to the network using the built-in wireless network card.

Solution: Ensure that:

•The wireless radio is enabled.

•Your wireless LAN driver is the latest version.

•your computer is within range of a wireless access point.

Problems with the keyboard and other pointing devices

The following are the most common problems with keyboards and other pointing devices.

An UltraNav pointing device problem

•Problem: The pointer drifts when the computer is turned on or after it resumes normal operation.

Solution: The pointer might drift when you are not using the TrackPoint pointing device during normal operation. This is a normal characteristic of the TrackPoint pointing device and is not a defect. Pointer drifting might occur for several seconds under the following conditions:

–When the computer is turned on

–When the computer resumes normal operation

–When the TrackPoint pointing device is kept pressed for a long time

–When the temperature changes

Chapter 5. Troubleshooting computer problems 45

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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 adaptersExternal devices Power supply statementPlugs and outlets 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 connectorBottom view Status indicatorsSystem status indicators 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 attach or replace a device? Special keysHow do I give presentations or attach an external monitor? Using the TrackPoint pointing device Using the UltraNav pointing deviceCustomizing the touch pad Using the touch padChanging the cap 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 a flash media card Using audio featuresUsing the camera Removing a flash media card Inserting a flash media cardUser Guide Ergonomic information Accessibility and comfortYou and your computer Comfort Accessibility informationAssistive technologies Travel accessoriesTraveling with your computer Travel tipsUser Guide Static electricity prevention Replacing the batteryReplacing devices 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 problemComputer screen problems Keyboard problemsProblems with the display and multimedia devices Audio problems External monitor problemsPower problems Battery and power problemsBattery problems Sleep problems Power button problemUser Guide Before you contact Lenovo Getting help and serviceGetting support Telephone numbers Lenovo Support Web siteCalling Lenovo 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