Univex 1938, 1962, 1966, 1942, 1837, 1782X01, 1741, 1762, 1738, 1654, 1761 Troubleshooting procedure

Page 66

Symptom

Action

 

 

The operating system does not

Verify that:

start.

• The startup sequence includes the device where the operating system resides.

 

 

Usually, the operating system is on the hard disk drive. For more information,

 

see “Selecting a startup device” on page 45.

 

 

The computer beeps multiple

Verify that no keys are stuck.

times before the operating

 

system starts.

 

 

 

Troubleshooting procedure

Use the following procedure as a starting point for diagnosing problems you are experiencing with your computer:

1.Verify that the cables for all attached devices are connected correctly and securely.

2.Verify that all attached devices that require ac power are connected to properly grounded, functioning electrical outlets.

3.Verify that all attached devices are enabled in the BIOS settings of your computer. For more information about accessing and changing the BIOS settings, refer to your Chapter 7 “Using the Setup Utility program” on page 43.

4.Go to the “Troubleshooting” on page 54 and follow the instructions for the type of problem you are experiencing. If the Troubleshooting information does not help you resolve a problem, continue with the next step.

5.Try using a previously captured configuration to see if a recent change to hardware or software settings has caused a problem. Before restoring a previous configuration, capture your current configuration in case the older configuration settings do not solve the problem or have adverse affects. To restore a captured configuration, do the following:

•On the Windows 7 operating system, click Start ➙ Control Panel ➙ System and Security ➙ System ➙ System Protection ➙ System Restore.

If this does not correct the problem, continue with the next step.

6.Run the diagnostic programs. See “Diagnostic programs” on page 69 for more information.

•If the diagnostic programs detect a hardware failure, contact the Lenovo Customer Support Center. See Chapter 11 “Getting information, help, and service” on page 73 for more information.

•If you are unable to run the diagnostic programs, contact the Lenovo Customer Support Center. See Chapter 11 “Getting information, help, and service” on page 73 for more information.

•If the diagnostic programs do not detect a hardware failure, continue with the next step.

7.Use an antivirus program to see if your computer has been infected by a virus. If the program detects a virus, remove the virus.

8.If none of these actions solve the problem, seek technical assistance. See Chapter 11 “Getting information, help, and service” on page 73 for more information.

Troubleshooting

Use the troubleshooting information to find solutions to problems that have definite symptoms.

If the symptom your computer is experiencing occurred immediately after you installed a new hardware option or new software, do the following before referring to the troubleshooting information:

1.Remove the new hardware option or software. If you must remove the computer cover to remove a hardware option, make sure you review and follow the electrical safety information provided with your computer. For your safety, do not operate the computer with the cover removed.

54ThinkCentre User Guide

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Contents ThinkCentre User Guide Fourth Edition June Copyright Lenovo 2011 Contents Appendix A. Notices Appendix E. Energy Star model information Index Iv ThinkCentre 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 User Guide Features Product overviewInput/Output I/O features System management featuresColor temperature adjustment Power supplyPreinstalled software programs Preinstalled operating systemSpecifications Software overviewSoftware provided by Lenovo Lenovo Welcome Lenovo Solution CenterLenovo ThinkVantage Tools Fingerprint SoftwareThinkVantage Power Manager Product RecoveryThinkVantage Password Manager ThinkVantage Rescue and RecoveryLocations ThinkVantage System UpdateAdobe Reader Antivirus software Communication UtilityFront connector, control, and indicator locations Locating connectors on the rear of your computer Rear connector locationsAdjusting the computer stand Connector DescriptionMachine type and model label Machine type and model labelThinkCentre User Guide Using the keyboard Using your computerFrequently asked questions Using Windows shortcut keysAdjusting audio Using a fingerprint readerUsing the wheel mouse About your computer audioUsing CDs and DVDs Setting the volume from the desktopSetting the volume from Control Panel Adding the volume icon to the taskbarUsing the single-touch and multi-touch feature Playing a CD or DVDRecording a CD or DVD Using the single-touch feature Color temperature adjustmentSelecting a pre-defined color temperature Using the multi-touch featureSwitching to RGB adjustment Making brightness adjustmentRed-adjustment Green-adjustment Blue-adjustment Exit Using your computer ThinkCentre User Guide Arranging your workspace Accessibility and comfortYou and your computer ComfortGlare and lighting Air circulationElectrical outlets and cable lengths Register your computer with Lenovo Voltage-selection switchReplacement power cords Moving your computer to another country or regionThinkCentre User Guide Security features SecurityUsing passwords Bios passwordsAttaching an integrated cable lock Using and understanding firewalls Windows passwordsSetting the fingerprint reader Protecting data against virusesThinkCentre User Guide Installing or replacing hardware Installing or replacing hardwareInstalling external options Replacing the USB keyboard or mouse Removing the monitor standReplacing the wireless keyboard Connecting the USB keyboard or mouseReplacing the wireless mouse Opening the battery compartment Obtaining device drivers Recovery information Creating and using recovery mediaCreating recovery media Using recovery media Performing backup and recovery operationsPerforming a backup operation Performing a recovery operation Using the Rescue and Recovery workspaceClick 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 ThinkCentre User Guide Using the Setup Utility program Starting the Setup Utility programViewing and changing settings Administrator Password Password considerationsPower-On Password Hard Disk PasswordSelecting a temporary startup device Enabling or disabling a deviceSelecting a startup device Selecting or changing the startup device sequenceExiting from the Setup Utility program Using system programs Updating flashing the Bios from a discUpdating system programs Updating flashing the Bios from your operating system Click Downloads and driversKeeping your computer current Preventing problemsUsing System Update Getting the latest device drivers for your computerBasics Keyboard Cleaning your computerComputer Optical mouseGood maintenance practices Cleaning a glass-screen surfaceMoving your computer Troubleshooting and diagnostics Basic troubleshootingTroubleshooting procedure TroubleshootingAudio problems No audio in WindowsCD problems Sound comes from one external speaker onlyNo audio in DOS applications or games DVD problems CD or DVD does not workBlack screen instead of DVD video Playback is very slow or choppy DVD movie will not playNo audio or intermittent audio while playing DVD movie Invalid disc or no disc found messageIntermittent problems Keyboard, mouse, or pointing device problemsAll or some keys on the keyboard do not work Pointer on the screen does not move smoothly with the mouse Wireless keyboard does not workMouse or pointing device does not work Fingerprint reader does not workMonitor problems Wrong characters appear on the screenImage appears to be flickering Networking problems Ethernet problemsImage is discolored Click Start Control Panel Click Hardware and Sound Wake on LAN feature is not workingYour computer cannot connect to the network Adapter stops working for no apparent reasonWireless LAN problem Wireless WAN problemBluetooth problems Sound does not come from the Bluetooth headphone Option problemsAn option that was just installed does not work An option that previously worked does not work nowInsufficient free hard disk drive space Performance and lockup problemsClick Disk Cleanup Click Start ComputerPrinter problems Serial port problemsExcessive number of fragmented files Software problems Software does not work as expectedUSB problems Diagnostic programsLenovo ThinkVantage Toolbox Lenovo Solution CenterCreating a diagnostic disc PC-Doctor for DOSRunning the diagnostic program from a diagnostic disc ThinkCentre User Guide Getting information, help, and service Calling for service Help and serviceUsing the documentation and diagnostic program Lenovo Support Web siteUsing other services Purchasing additional servicesThinkCentre User Guide Appendix A. Notices Trademarks Television output notice Appendix B. Regulatory informationExport classification notice Electronic emissions noticesIndustry Canada Class B emission compliance statement Additional regulatory information ThinkCentre 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 User Guide China RoHS Turkish RoHS Ukraine RoHSIndia RoHS Appendix E. Energy Star model information Windows 7 operating systemThinkCentre User Guide Index Setting, changing, deleting Page 1P0B03427
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