Lenovo 1654, 1938, 1962 Cleaning your computer, Computer, Keyboard, Optical mouse, Display screen

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Cleaning your computer

It is a good practice to clean your computer periodically to protect the surfaces and ensure trouble-free operation.

CAUTION:

Be sure to turn off the computer and monitor power switches before cleaning the computer and monitor screen.

Computer

Use only mild cleaning solutions and a damp cloth to clean the painted surfaces of the computer.

Keyboard

To clean your computer keyboard, do the following:

1.Apply some isopropyl rubbing alcohol to a soft, dust-free cloth.

2.Wipe each keytop surface with the cloth. Wipe the keys one by one; if you wipe several keys at a time, the cloth may hook onto an adjacent key and possibly damage it. Make sure that no liquid drips onto or between the keys.

3.To remove any crumbs or dust from beneath the keys, you can use a camera blower with a brush or cool air from a hair dryer.

Note: Avoid spraying cleaner directly onto the display or the keyboard.

Optical mouse

This section provides instructions on how to clean an optical mouse.

An optical mouse uses a light-emitting diode (LED) and an optical sensor to navigate the pointer. If the pointer on the screen does not move smoothly with the optical mouse, you might need to clean the mouse.

To clean an optical mouse, do the following:

1.Turn off your computer.

2.Disconnect the mouse cable from the computer.

3.Turn the mouse upside down to check the lens.

a.If there is a smudge on the lens, gently clean the area with a plain cotton-tipped swab.

b.If there is debris in the lens, gently blow the debris away from the area.

4.Check the surface on which you are using the mouse. If you have a very intricate picture or pattern beneath the mouse, it may be difficult for the digital signal processor (DSP) to determine changes in the mouse position.

5.Reconnect the mouse cable to the computer.

6.Turn your computer back on.

Display screen

Dust buildup compounds problems associated with glare. Remember to clean your monitor screen periodically. See “Cleaning a flat-panel monitor surface” on page 49 or “Cleaning a glass-screen surface” on page 50.

Cleaning a flat-panel monitor surface

If you have a flat-panel computer display that has a flexible film surface, do the following to clean the special surface. Wipe it gently with a soft, dry cloth, or blow on the screen to remove grit and other loose particles. Then moisten a cloth with LCD cleaner and wipe the screen surface.

Chapter 9. Preventing problems

49

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Contents ThinkCentre User Guide Second Edition October Copyright Lenovo Contents Appendix A. Notices Static electricity prevention Important safety informationService and upgrades Extension cords and related devices Power cords and power adaptersHeat and product ventilation Plugs and outletsExternal devices Operating environment Modem safety informationLaser compliance statement Power supply statementCleaning and maintenance Viii ThinkCentre User Guide Product overview FeaturesPower supply System management featuresColor temperature adjustment Input/Output I/O featuresPreinstalled operating system Preinstalled software programsSoftware provided by Lenovo SpecificationsSoftware overview Lenovo Welcome Product RecoveryThinkVantage Password Manager Lenovo ThinkVantage ToolsAdobe Reader Antivirus software Locations Front connector, control, and indicator locations Rear connector locations Locating connectors on the rear of your computerConnector Description Adjusting the computer standMachine type and model label Machine type and model labelThinkCentre User Guide Using Windows shortcut keys Using your computerFrequently asked questions Using the keyboardAdjusting audio Using the blue ThinkVantage buttonUsing a fingerprint reader Using the wheel mouseAdding the volume icon to the taskbar Setting the volume from the desktopSetting the volume from Control Panel Using CDs and DVDsRecording a CD or DVD Handling and storing CD and DVD mediaPlaying a CD or DVD Using the multi-touch feature Using the single-touch and multi-touch featureColor temperature adjustment Using the single-touch featureRed-adjustment Green-adjustment Blue-adjustment Exit Selecting a pre-defined color temperatureSwitching to RGB adjustment Making brightness adjustmentUsing your computer ThinkCentre User Guide Comfort Accessibility and comfortYou and your computer Arranging your workspaceElectrical outlets and cable lengths Glare and lightingAir circulation Moving your computer to another country or region Voltage-selection switchReplacement power cords Register your computer with LenovoThinkCentre User Guide Security Security featuresAttaching an integrated cable lock Using passwordsBios passwords Protecting data against viruses Windows passwordsSetting the fingerprint reader Using and understanding firewallsThinkCentre User Guide Installing external options Installing or replacing hardwareInstalling or replacing hardware Replacing the wireless mouse Replacing the wireless keyboardOpening the battery compartment Obtaining device drivers Closing the battery compartment coverCreating recovery media Recovery informationCreating and using recovery media Performing a backup operation Using recovery mediaPerforming backup and recovery operations Click the Restore your system from a backup icon Performing a recovery operationUsing the Rescue and Recovery workspace 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 ThinkCentre User Guide Viewing and changing settings Using the Setup Utility programStarting the Setup Utility program Hard Disk Password Password considerationsPower-On Password Administrator PasswordSelecting or changing the startup device sequence Enabling or disabling a deviceSelecting a startup device Selecting a temporary startup deviceExiting from the Setup Utility program Updating system programs Using system programsUpdating flashing the Bios from a disc 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 Optical mouse Cleaning your computerComputer KeyboardMoving your computer Good maintenance practicesCleaning a glass-screen surface Basic troubleshooting Troubleshooting and diagnosticsTroubleshooting Troubleshooting procedureNo audio in Windows Audio problemsNo audio in DOS applications or games CD problemsSound comes from one external speaker only Black screen instead of DVD video DVD problemsCD or DVD does not work Invalid disc or no disc found message DVD movie will not playNo audio or intermittent audio while playing DVD movie Playback is very slow or choppyAll or some keys on the keyboard do not work Intermittent problemsKeyboard, mouse, or pointing device problems Fingerprint reader does not work Wireless keyboard does not workMouse or pointing device does not work Pointer on the screen does not move smoothly with the mouseImage appears to be flickering Monitor problemsWrong characters appear on the screen Image is discolored Networking problemsEthernet problems Adapter stops working for no apparent reason Wake on LAN feature is not workingYour computer cannot connect to the network Click Start Control Panel Click Hardware and SoundBluetooth problems Wireless LAN problemWireless WAN problem An option that previously worked does not work now Option problemsAn option that was just installed does not work Sound does not come from the Bluetooth headphoneClick Start Computer Performance and lockup problemsClick Disk Cleanup Insufficient free hard disk drive spaceExcessive number of fragmented files Printer problemsSerial port problems Software does not work as expected Software problemsDiagnostic programs USB problemsPC-Doctor for DOS Creating a diagnostic discRunning the diagnostic program from a diagnostic disc Lenovo ThinkVantage ToolboxGetting information, help, and service Lenovo Support Web site Help and serviceUsing the documentation and diagnostic programs Calling for servicePurchasing additional services Using other servicesThinkCentre User Guide Appendix A. Notices Trademarks Electronic emissions notices Appendix B. Regulatory informationExport classification notice Television output noticeIndustry Canada Class B emission compliance statement Additional regulatory information ThinkCentre User Guide Recycling information Appendix C. Weee and recycling informationImportant information for the European Directive 2002/96/EC ThinkCentre User Guide Index Optical mouse cleaning Password Administrator Considerations Page 0B03427