Lenovo 3423, 3398, 3397, 3399 Wireless LAN problem, Adapter stops working for no apparent reason

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1.Open Control Panel.

2.Click Hardware and Sound.

3.Click Device Manager. If you are prompted for an administrator password or confirmation, type the password or provide confirmation.

4.If an exclamation mark is displayed next to an adapter name under Network adapters, you might not be using the correct driver or the driver is not enabled. To update the driver, right-click the highlighted adapter.

5.Click Update Driver Software, and then follow the instructions on the screen.

•The switch port and the adapter have the same duplex setting.

If you configured the adapter for full duplex, make sure the switch port is also 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.

The adapter stops working for no apparent reason

Symptom: The adapter stops working for no apparent reason.

Action: The network driver files may be corrupt or missing. Update the driver by referring to the “Solution” description for the procedure to make sure that the correct device driver is installed.

The Wake on LAN feature is not working

Symptom: The Wake on LAN (WOL) feature is not working.

Actions:

•Make sure that WOL is enabled in the BIOS Setup Utility program.

•If it is, check with your LAN administrator for the necessary settings.

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

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

Actions:

•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).

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

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

Actions:

•Try another cable.

•Make sure that the link partner is set to auto-negotiate.

•Make sure that the switch is 802.3ab-compliant (gigabit over copper).

A wireless LAN problem

Symptom: You cannot connect using the built-in wireless networking card.

68ThinkCentre Edge User Guide

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Contents ThinkCentre Edge User Guide Third Edition September Copyright Lenovo Contents Appendix A. Notices Iii Iv ThinkCentre Edge User Guide Static electricity prevention Important safety informationService and upgrades Power cords and power adapters Extension cords and related devicesHeat and product ventilation Plugs and outletsExternal devices Modem safety information Operating environmentLaser compliance statement Power supply statementCleaning and maintenance ThinkCentre Edge User Guide Features Product overviewSystem management features Input/Output I/O featuresPower supply ConnectivityPreinstalled operating system Security featuresPreinstalled software programs Lenovo programs SpecificationsAccessing Lenovo programs on the Windows 7 operating system Accessing Lenovo programs from Control Panel Program Icon nameAccessing Lenovo programs on the Windows 8 operating system An introduction to Lenovo programsCommunications Utility Fingerprint SoftwareLenovo Settings Lenovo Solution CenterPassword Manager Power ManagerView Management Utility System UpdateLocations Connector Description Locating connectors on the rear of your computer Hdmi connectorAdjusting the computer stand Machine type and model labelFollowing is a sample of the machine type and model label Using your computer Frequently asked questionsAccessing Control Panel on the Windows 8 operating system Where can I find help about the Windows operating system?Using the keyboard Using Windows shortcut keysUsing the blue ThinkVantage button Using a fingerprint readerUsing the wheel mouse Adjusting audioSetting the volume from the desktop Adding the volume icon to the taskbarSetting the volume from Control Panel Using CDs and DVDsSound section, click Adjust system volume Handling and storing CD and DVD mediaRecording a CD or DVD Using the single-touch and multi-touch featurePlaying a CD or DVD Using the single-touch feature Using the multi-touch featureAccessibility and comfort You and your computerArranging your workspace ComfortElectrical outlets and cable lengths Glare and lightingAir circulation Moving your computer to another country or region Voltage-selection switchRegister your computer with Lenovo Replacement power cords Security features SecurityAttaching an integrated cable lock Using passwordsBios passwords Protecting data against viruses Windows passwordsUsing and understanding firewalls ThinkCentre Edge User Guide Installing or replacing hardware Installing or replacing hardwareInstalling external options Removing and reinstalling the system stand hinge coverRemoving the system stand hinge cover Removing and reinstalling the system stand Removing the system stand Removing and reinstalling the foot stands Removing the rubber piece from each foot standReinstall the rubber piece on each foot stand Replacing the wireless keyboard Replacing the USB keyboard or mouseReplacing the wireless mouse Installing the keyboard batteriesInstalling or replacing hardware Obtaining device drivers Creating and using recovery media Recovery informationRecovery information for the Windows 7 operating system Performing backup and recovery operations Creating recovery mediaUsing recovery media Performing a backup operationClick the Restore your system from a backup icon Using the Rescue and Recovery workspacePerforming a recovery operation Creating a rescue medium Creating and using a rescue mediumUsing a rescue medium Reinstalling preinstalled device drivers Reinstalling preinstalled applications and device driversReinstalling preinstalled applications Solving recovery problems Reinstalling software programsReinstalling device drivers Recovery information for the Windows 8 operating system Refreshing your computerThinkCentre Edge User Guide Using the Setup Utility program Starting the Setup Utility programViewing and changing settings Password considerationsPower-On Password Administrator PasswordSetting, changing, and deleting a password Enabling or disabling a deviceExiting the Setup Utility program Selecting a startup deviceSelecting a temporary startup device Selecting or changing the startup device sequenceThinkCentre Edge User Guide Updating system programs Using system programsUpdating flashing the Bios from a disc Updating flashing the Bios from your operating system Click Downloads and driversPreventing problems Using System UpdateKeeping your computer current Getting the latest device drivers for your computerCleaning your computer BasicsComputer KeyboardOptical mouse Display screenGood maintenance practices Cleaning a liquid crystal display LCD surfaceCleaning a glass-screen surface Moving your computerPreventing problems ThinkCentre Edge User Guide Troubleshooting and diagnostics Basic troubleshootingTroubleshooting procedure No audio in Windows TroubleshootingAudio problems Sound comes from one external speaker only No audio in DOS applications or gamesCD problems CD or DVD does not workDVD problems Black screen instead of DVD videoDVD movie will not play No audio or intermittent audio while playing DVD movieIntermittent problems Keyboard, mouse, or pointing device problemsInvalid disc or no disc found message All or some keys on the keyboard do not workMouse or pointing device does not work Pointer on the screen does not move smoothly with the mouseFingerprint reader does not work Click Hardware and Sound Click Devices and PrintersWrong characters appear on the screen Monitor problemsWireless keyboard does not work Image appears to be flickering Image is discoloredNetworking problems Ethernet problemsYour computer cannot connect to the network Click Start Control Panel Click Hardware and SoundAdapter stops working for no apparent reason Wireless LAN problemWake on LAN feature is not working Option problems Wireless WAN problemBluetooth problem An option that was just installed does not workPerformance and lockup problems An option that previously worked does not work nowInsufficient free hard disk drive space Click Start ComputerExcessive number of fragmented files Printer problems Serial port problemsSoftware problems Click OptimizeUSB problems Software does not work as expectedLenovo Solution Center Getting information, help, and service Help and service Using the documentation and diagnostic programsCalling for service Lenovo Support Web siteUsing other services Purchasing additional servicesThinkCentre Edge User Guide Appendix A. Notices Trademarks Appendix B. Regulatory information Export classification noticeElectronic emissions notices Federal Communications Commission Declaration of ConformityThinkCentre Edge User Guide Additional regulatory information ThinkCentre Edge User Guide Recycling information Appendix C. Weee and recycling informationImportant Weee information Battery recycling information for Taiwan Recycling information for BrazilBattery recycling information for the European Union ThinkCentre Edge User Guide China RoHS Turkish RoHS Ukraine RoHSIndia RoHS Appendix E. Energy Star model information Windows 7 or Windows 8 operating systemThinkCentre Edge User Guide İmalatçı ya da ithalatçı firmaya ilişkin bilgiler Bakım, onarım ve kullanımda uyulması gereken kurallarTaşıma ve nakliye sırasında dikkat edilecek hususlar Kullanım hatalarına ilişkin bilgilerBağlantı ve montaja ilişkin bilgiler Garanti Hizmetinin Alınabileceği Merkezler Bdh Bilişim Destek Hiz. San. Ve Tic. A.ŞDestek Bilgisayar Ve İletişim Hiz. Tic. A.Ş Bdh Bilişim Destek Hizmetleri San.Ve TicYedi Yirmidört Bilişim Hizmetleri Ticaret A.S Bdh Bilişim Destek Hizmetleri San.Ve Tic.AşBilgi Birikim Sistemleri Elktr. ve Bilg Adapa Bilgi Sistemleri Tur.San. Ve Tic.A.Ş Bdh Bilişim Destek Hizmetleri San.Ve Tic. A.ŞBdh Bilişim Destek Hizmetleri Sanayi Ve Ticaret A.Ş Bdh Bilişim Destek Hizmetleri San.Ve Tic.A.ŞŞanliurfa Index Password Administrator Considerations
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