Lenovo 3398 Sound comes from one external speaker only, No audio in DOS applications or games

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•If you are using powered external speakers that have an On/Off control, verify that the On/Off control is set to the On position and the speaker power cable is connected to a properly grounded, functional ac electrical outlet.

•If your external speakers have a volume control, verify that the volume control is not set too low.

•Double-click the speaker icon in the Windows notification area. A master volume-control window opens. Verify that the Mute settings are not checked and none of the volume settings is set too low.

•Some models have a front audio panel you can use to adjust volume. If you have a front audio panel, verify that the volume is not set too low.

•Verify that your external speakers (and headphones, if used) are connected to the correct audio connector on the computer. Most speaker cables are color-coded to match the connector.

Note: When external-speaker or headphone cables are attached to the audio connector, the internal speaker, if present, is disabled. In most cases, if an audio adapter is installed in one of the expansion slots, the audio function built into the system board is disabled; use the audio jacks on the adapter.

•Make sure that the program you are running is designed for use in the Microsoft Windows operating system. If the program is designed to run in DOS, the program does not use the Windows sound feature and must be configured to use SoundBlaster Pro or SoundBlaster emulation.

•Verify that the audio device drivers are correctly installed. See Microsoft Windows help system for more information.

If these actions do not correct the problem, run the diagnostic programs (see “Lenovo Solution Center” on page 74 for instructions). If you need technical assistance, see Chapter 11 “Getting information, help, and service” on page 75.

An audio disc or AutoPlay-enabled disc does not automatically play when it is inserted into a drive

Symptom: An audio disc or AutoPlay-enabled disc does not automatically play when it is inserted into a drive

Action: See “CD problems” on page 61.

Sound comes from one external speaker only

Symptom: Sound comes from one external speaker only.

Actions:

•Ensure that the speaker cable is inserted completely into the connector on the computer.

•Make sure the cable that attaches the left speaker to the right speaker is securely connected.

•Double-click the speaker icon in the Windows notification area. A master volume-control window opens. Verify that the Balance settings are set correctly.

If these actions do not correct the problem, you might have a failing speaker. Have the speaker serviced. If you need technical assistance, see Chapter 11 “Getting information, help, and service” on page 75.

No audio in DOS applications or games

Symptom: No audio in DOS applications or games

Actions:

•Make sure the DOS application or game is configured to use SoundBlaster Pro or SoundBlaster emulation. Refer to the documentation that comes with the application or game for instructions on setting sound-card settings.

60ThinkCentre 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 Important safety information Service and upgradesStatic electricity prevention Power cords and power adapters Extension cords and related devicesPlugs and outlets External devicesHeat and product ventilation Modem safety information Operating environmentPower supply statement Cleaning and maintenanceLaser compliance statement ThinkCentre Edge User Guide Features Product overviewSystem management features Input/Output I/O featuresPower supply ConnectivitySecurity features Preinstalled software programsPreinstalled operating system Specifications Accessing Lenovo programs on the Windows 7 operating systemLenovo programs 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 ManagerSystem Update LocationsView Management Utility 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 mediaUsing the single-touch and multi-touch feature Playing a CD or DVDRecording a CD or DVD Using the single-touch feature Using the multi-touch featureAccessibility and comfort You and your computerArranging your workspace ComfortGlare and lighting Air circulationElectrical outlets and cable lengths Voltage-selection switch Register your computer with LenovoMoving your computer to another country or region Replacement power cords Security features SecurityUsing passwords Bios passwordsAttaching an integrated cable lock Windows passwords Using and understanding firewallsProtecting data against viruses 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 Recovery information Recovery information for the Windows 7 operating systemCreating and using recovery media Performing backup and recovery operations Creating recovery mediaUsing recovery media Performing a backup operationUsing the Rescue and Recovery workspace Performing a recovery operationClick the Restore your system from a backup icon Creating and using a rescue medium Using a rescue mediumCreating a rescue medium Reinstalling preinstalled applications and device drivers Reinstalling preinstalled applicationsReinstalling preinstalled device drivers Reinstalling software programs Reinstalling device driversSolving recovery problems 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 Using system programs Updating flashing the Bios from a discUpdating system programs 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 Troubleshooting Audio problemsNo audio in Windows 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 PrintersMonitor problems Wireless keyboard does not workWrong characters appear on the screen Image appears to be flickering Image is discoloredNetworking problems Ethernet problemsYour computer cannot connect to the network Click Start Control Panel Click Hardware and SoundWireless LAN problem Wake on LAN feature is not workingAdapter stops working for no apparent reason 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 Appendix C. Weee and recycling information Important Weee informationRecycling 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 TicBdh Bilişim Destek Hizmetleri San.Ve Tic.Aş Bilgi Birikim Sistemleri Elktr. ve BilgYedi Yirmidört Bilişim Hizmetleri Ticaret A.S 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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