Lenovo 3415 Networking problems, Ethernet problems, Your computer cannot connect to the network

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2.Adjust the placement of the monitor and other devices so that they are at least 305 mm (12 inches) apart.

3.Turn on the monitor.

If these actions do not correct the problem, your monitor might need service. See Chapter 11 “Getting information, help, and service” on page 75 for details.

Networking problems

The following are the most common networking problems. Select your networking problem from the following list:

•“Ethernet problems” on page 67

•“A wireless LAN problem” on page 68

•“A wireless WAN problem” on page 69

•“Bluetooth problem” on page 69

For more information, see “Help and Support” on page 75.

Ethernet problems

For Ethernet problems, select your symptom from the following list:

•“Your computer cannot connect to the network” on page 67

•“The adapter stops working for no apparent reason” on page 68

•“If your computer is a Gigabit Ethernet model and you use a speed of 1000 Mbps, the connection fails or errors occur” on page 68

•“If your computer is a Gigabit Ethernet model, it cannot connect to the network at 1000 Mbps. Instead, it connects at 100 Mbps” on page 68

Your computer cannot connect to the network

Symptom: Your computer cannot connect to the network.

Actions: Make sure that:

•The cable is installed properly.

The network cable must be securely connected to both the Ethernet connector of your computer and the RJ45 connector of the hub. The maximum allowable distance from the computer to hub is 100 meters. If the cable is connected and the distance is within acceptable limits but the problem persists, try a different cable.

•The cable is installed properly.

•You are using the correct device driver.

On the Windows 7 operating system, do the following:

1.Click Start ➙ 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.

On the Windows 8 operating system, do the following:

Chapter 10. Troubleshooting and diagnostics 67

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Contents ThinkCentre Edge User Guide Third Edition September Copyright Lenovo Contents Appendix A. Notices Iii Iv ThinkCentre Edge User Guide Service and upgrades Important safety informationStatic electricity prevention Extension cords and related devices Power cords and power adaptersExternal devices Plugs and outletsHeat and product ventilation Operating environment Modem safety informationCleaning and maintenance Power supply statementLaser compliance statement ThinkCentre Edge User Guide Product overview FeaturesConnectivity System management featuresInput/Output I/O features Power supplyPreinstalled software programs Security featuresPreinstalled operating system Accessing Lenovo programs on the Windows 7 operating system SpecificationsLenovo programs Program Icon name Accessing Lenovo programs from Control PanelFingerprint Software Accessing Lenovo programs on the Windows 8 operating systemAn introduction to Lenovo programs Communications UtilityPower Manager Lenovo SettingsLenovo Solution Center Password ManagerLocations System UpdateView Management Utility Connector Description Hdmi connector Locating connectors on the rear of your computerMachine type and model label Adjusting the computer standFollowing is a sample of the machine type and model label Where can I find help about the Windows operating system? Using your computerFrequently asked questions Accessing Control Panel on the Windows 8 operating systemUsing a fingerprint reader Using the keyboardUsing Windows shortcut keys Using the blue ThinkVantage buttonAdding the volume icon to the taskbar Using the wheel mouseAdjusting audio Setting the volume from the desktopHandling and storing CD and DVD media Setting the volume from Control PanelUsing CDs and DVDs Sound section, click Adjust system volumePlaying a CD or DVD Using the single-touch and multi-touch featureRecording a CD or DVD Using the multi-touch feature Using the single-touch featureComfort Accessibility and comfortYou and your computer Arranging your workspaceAir circulation Glare and lightingElectrical outlets and cable lengths Register your computer with Lenovo Voltage-selection switchMoving your computer to another country or region Replacement power cords Security Security featuresBios passwords Using passwordsAttaching an integrated cable lock Using and understanding firewalls Windows passwordsProtecting data against viruses ThinkCentre Edge User Guide Removing and reinstalling the system stand hinge cover Installing or replacing hardwareInstalling or replacing hardware Installing external optionsRemoving the system stand hinge cover Removing and reinstalling the system stand Removing the system stand Removing the rubber piece from each foot stand Removing and reinstalling the foot standsReinstall the rubber piece on each foot stand Replacing the USB keyboard or mouse Replacing the wireless keyboardInstalling the keyboard batteries Replacing the wireless mouseInstalling or replacing hardware Obtaining device drivers Recovery information for the Windows 7 operating system Recovery informationCreating and using recovery media Performing a backup operation Performing backup and recovery operationsCreating recovery media Using recovery mediaPerforming a recovery operation Using the Rescue and Recovery workspaceClick the Restore your system from a backup icon Using a rescue medium Creating and using a rescue mediumCreating a rescue medium Reinstalling preinstalled applications Reinstalling preinstalled applications and device driversReinstalling preinstalled device drivers Reinstalling device drivers Reinstalling software programsSolving recovery problems Refreshing your computer Recovery information for the Windows 8 operating systemThinkCentre Edge User Guide Password considerations Using the Setup Utility programStarting the Setup Utility program Viewing and changing settingsEnabling or disabling a device Power-On PasswordAdministrator Password Setting, changing, and deleting a passwordSelecting or changing the startup device sequence Exiting the Setup Utility programSelecting a startup device Selecting a temporary startup deviceThinkCentre Edge User Guide Updating flashing the Bios from a disc Using system programsUpdating system programs Click Downloads and drivers Updating flashing the Bios from your operating systemGetting the latest device drivers for your computer Preventing problemsUsing System Update Keeping your computer currentBasics Cleaning your computerDisplay screen ComputerKeyboard Optical mouseMoving your computer Good maintenance practicesCleaning a liquid crystal display LCD surface Cleaning a glass-screen surfacePreventing problems ThinkCentre Edge User Guide Basic troubleshooting Troubleshooting and diagnosticsTroubleshooting procedure Audio problems TroubleshootingNo audio in Windows No audio in DOS applications or games Sound comes from one external speaker onlyCD or DVD does not work CD problemsNo audio or intermittent audio while playing DVD movie DVD problemsBlack screen instead of DVD video DVD movie will not playAll or some keys on the keyboard do not work Intermittent problemsKeyboard, mouse, or pointing device problems Invalid disc or no disc found messageClick Hardware and Sound Click Devices and Printers Mouse or pointing device does not workPointer on the screen does not move smoothly with the mouse Fingerprint reader does not workWireless keyboard does not work Monitor problemsWrong characters appear on the screen Image is discolored Image appears to be flickeringClick Start Control Panel Click Hardware and Sound Networking problemsEthernet problems Your computer cannot connect to the networkWake on LAN feature is not working Wireless LAN problemAdapter stops working for no apparent reason An option that was just installed does not work Option problemsWireless WAN problem Bluetooth problemClick Start Computer Performance and lockup problemsAn option that previously worked does not work now Insufficient free hard disk drive spaceExcessive number of fragmented files Click Optimize Printer problemsSerial port problems Software problemsSoftware does not work as expected USB problemsLenovo Solution Center Getting information, help, and service Lenovo Support Web site Help and serviceUsing the documentation and diagnostic programs Calling for servicePurchasing additional services Using other servicesThinkCentre Edge User Guide Appendix A. Notices Trademarks Federal Communications Commission Declaration of Conformity Appendix B. Regulatory informationExport classification notice Electronic emissions noticesThinkCentre Edge User Guide Additional regulatory information ThinkCentre Edge User Guide Important Weee information Appendix C. Weee and recycling informationRecycling information Recycling information for Brazil Battery recycling information for TaiwanBattery recycling information for the European Union ThinkCentre Edge User Guide Ukraine RoHS China RoHS Turkish RoHSIndia RoHS Windows 7 or Windows 8 operating system Appendix E. Energy Star model informationThinkCentre Edge User Guide Kullanım hatalarına ilişkin bilgiler İmalatçı ya da ithalatçı firmaya ilişkin bilgilerBakım, onarım ve kullanımda uyulması gereken kurallar Taşıma ve nakliye sırasında dikkat edilecek hususlarBağlantı ve montaja ilişkin bilgiler Bdh Bilişim Destek Hizmetleri San.Ve Tic Garanti Hizmetinin Alınabileceği MerkezlerBdh Bilişim Destek Hiz. San. Ve Tic. A.Ş Destek Bilgisayar Ve İletişim Hiz. Tic. A.ŞBilgi Birikim Sistemleri Elktr. ve Bilg Bdh Bilişim Destek Hizmetleri San.Ve Tic.AşYedi Yirmidört Bilişim Hizmetleri Ticaret A.S Bdh Bilişim Destek Hizmetleri San.Ve Tic.A.Ş Adapa Bilgi Sistemleri Tur.San. Ve Tic.A.ŞBdh Bilişim Destek Hizmetleri San.Ve Tic. A.Ş Bdh Bilişim Destek Hizmetleri Sanayi Ve Ticaret A.ŞŞanliurfa Index Password Administrator Considerations