Manuals / Lenovo / Computer Equipment / Personal Computer

Lenovo 2756, 2988, 2992E5U, 2982, 2993, 2996, 3393, 3395, 3306, 3224 Removing the cover presence switch

Models: 2756 2800 2934 2945 2941 2932 2929 2961 3183 3218 3181 3227 3198 3209 3207 3185 3214 3187 3202 3224 3306 3395 3393 2996 2993 2982 2992E5U 2988

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6.Remove the screw that secures the cover presence switch and remove the cover presence switch from the chassis.

Figure 57. Removing the cover presence switch

7.Position the new cover presence switch so that the screw hole in the cover presence switch is aligned with the corresponding hole in the chassis.

Chapter 5. Installing or replacing hardware 71

Image 83

Lenovo 2756, 2988, 2992E5U, 2982, 2993, 2996, 3393, 3395, 3306, 3224, 3202, 3187, 3214, 3185, 3207 Removing the cover presence switch

Contents

ThinkCentre User Guide Second Edition September Copyright Lenovo Contents Recovery information Appendix A. Notices 129 Iv ThinkCentre User Guide Static electricity prevention Important safety informationService and upgrades Extension cords and related devices Power cords and power adapters Heat and product ventilation Plugs and outletsExternal devices Operating environment Modem safety information Laser compliance statement Power supply statementCleaning and maintenance ThinkCentre User Guide Product overview Features Connectivity System management features Preinstalled software programs Input/Output I/O featuresPower supply Security features Environment Specifications Lenovo programs Accessing Lenovo programs on the Windows 7 operating systemAccessing Lenovo programs from Control Panel Communications Utility Accessing Lenovo programs on the Windows 8 operating systemAn introduction to Lenovo programs Recovery Media Lenovo Solution CenterPassword Manager Power Manager SimpleTap Rescue and RecoverySystem Update Locations Front connector, control, and indicator locations Connector Description Locating connectors on the rear of your computer Connector Description Locating parts on the system board Locating components System board part locations System board part locations Drive bay locations Locating internal drives Machine type and model label 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 system Using a fingerprint reader Using the keyboardUsing Windows shortcut keys Using the blue ThinkVantage button Adding the volume icon to the taskbar Using the wheel mouseAdjusting audio Setting the volume from the desktop Handling and storing CD and DVD media Setting the volume from Control PanelUsing CDs and DVDs Sound topic, click Adjust system volume Recording a CD or DVD Playing a CD or DVD ThinkCentre User Guide Comfort Accessibility and comfortYou and your computer Arranging your workspace Electrical outlets and cable lengths Glare and lightingAir circulation Moving your computer to another country or region Voltage-selection switchRegistering your computer Replacement power cords Security Security features Attaching an integrated cable lock Using passwordsBios passwords Protecting data against viruses Windows passwordsConfiguring the fingerprint reader Using and understanding firewalls ThinkCentre User Guide Handling static-sensitive devices Installing or replacing hardwareInstalling or replacing hardware Installing external options Opening the computer cover Removing and reinstalling the front bezel Removing the front bezel What to do next Accessing the system board components and drives Installing or replacing a memory module Removing a memory module Installing a memory module Installing or replacing a PCI card Removing a PCI card Installing the card reader Installing or replacing the card reader Installing the card reader Installing the screw that secures the card reader Removing the screw that secures the card reader Replacing the card reader Installing the card reader Installing the mSATA solid state drive Installing or replacing the mSATA solid state drive Installing or replacing hardware Installing the mSATA solid state drive storage converter Replacing the mSATA solid state drive Removing the mSATA solid state drive storage converter Removing the mSATA solid state drive Installing the mSATA solid state drive storage converter Installing the screw that secures the storage converter Replacing the battery Removing the old battery Installing the solid state disk Installing the solid state disk into the adapter Removing the hard disk drive Replacing the hard disk drive Removing the hard disk drive from the bracket Replacing the optical drive Installing the hard disk drive Pivoting the optical drive bay Removing the old optical drive Installing a new optical drive Replacing the heat sink and fan assembly Screws that secure the heat sink and fan assembly Removing the heat sink fan duct Installing the heat sink fan duct Replacing the power supply assembly Installing or replacing hardware Removing the heat sink fan duct Power connectors on the system board Removing the power supply assembly Replacing the microprocessor Accessing the microprocessor Installing the microprocessor Replacing the cover presence switch Removing the cover presence switch Replacing the internal speaker Installing the new cover presence switch Removing the internal speaker Installing the new internal speaker Replacing the front audio and USB assembly Removing the front audio and USB assembly Removing the WiFi adapter card Replacing the WiFi units Removing the WiFi adapter card Removing the WiFi card module Removing the screws that secure the WiFi card module Installing the WiFi units Installing the WiFi card module Installing the rear WiFi antenna Installing or removing the rear WiFi antenna Installing the rear WiFi antenna Removing the rear WiFi antenna Installing the front WiFi antenna Installing or removing the front WiFi antenna Peeling off the paper that protects the sticker Removing the front WiFi antenna Removing the front WiFi antenna Replacing the keyboard or mouse Completing the parts replacement Obtaining device drivers Creating and using recovery media Recovery informationRecovery information for the Windows 7 operating system Performing a backup operation Performing backup and recovery operationsCreating recovery media Using recovery media Click 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 Refreshing your computer Recovery information for the Windows 8 operating system ThinkCentre User Guide Viewing and changing settings Using the Setup Utility programStarting the Setup Utility program Hard Disk Password Password considerationsPower-On Password Administrator Password Enabling or disabling a device Erasing lost or forgotten passwords clearing Cmos Selecting or changing the startup device sequence Enabling ErP compliance modeSelecting a startup device Selecting a temporary startup device ICE thermal alert ICE performance modeDisabled Exiting the Setup Utility program 101 Using system programsUpdating flashing the Bios from a disc Updating system programs Click Download Drivers & Software Click Use Quick Path Updating flashing the Bios from your operating systemRecovering from a POST/BIOS update failure Updating your operating system Preventing problemsKeeping your computer current Getting the latest device drivers for your computer Basics Using System Update Optical mouse Cleaning your computerComputer Keyboard Moving your computer Good maintenance practicesCleaning a glass-screen surface 107 Troubleshooting and diagnosticsBasic troubleshooting Troubleshooting Troubleshooting procedure No audio in Windows Audio problems No 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 choppy All 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 mouse Image appears to be flickering Monitor problemsWrong characters appear on the screen Image is discolored Networking problems Adapter stops working for no apparent reason Ethernet problemsYour computer cannot connect to the network Click Start Control Panel Click Hardware and Sound Wake on LAN feature is not working Wireless LAN problemWireless WAN problem Sound does not come from the Bluetooth headphone Option problemsBluetooth problems An option that was just installed does not work Click Start Computer Performance and lockup problemsAn option that previously worked does not work now Insufficient free hard disk drive space Excessive number of fragmented files Click Optimize Printer problemsSerial port problems Insufficient memory Software does not work as expected Software problems Lenovo Solution Center USB problems Getting information, help, and service Lenovo Support Web site Help and serviceUsing the documentation and diagnostic program Calling for service Purchasing additional services Using other services ThinkCentre User Guide 129 Appendix A. Notices Trademarks Federal Communications Commission Declaration of Conformity Appendix B. Regulatory informationExport classification notice Electronic emissions notices ThinkCentre User Guide Additional regulatory information ThinkCentre User Guide 135 Appendix C. Weee and recycling informationImportant Weee information Recycling information Recycling information for Brazil Battery recycling information for Taiwan Battery recycling information for the European Union ThinkCentre User Guide 139 China RoHS Turkish RoHSUkraine RoHS India RoHS 141 Appendix E. Energy Star model information ThinkCentre User Guide 143 Index Setting, changing, deleting 145 ThinkCentre User Guide