Removing the cover presence switch | Lenovo 2756D7U, 2697 instruction

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

Figure 63. Removing the cover presence switch

74ThinkCentre User Guide

Image 86

Lenovo 2756D7U, 2697 manual Removing the cover presence switch

Contents

ThinkCentre User Guide Third Edition May Copyright Lenovo Contents Recovery information Appendix A. Notices 131 Iv ThinkCentre User Guide Static electricity prevention Important safety informationService and upgrades Power cords and power adapters Extension cords and related devices Heat and product ventilation Plugs and outletsExternal devices Modem safety information Operating environment Laser compliance statement Power supply statementCleaning and maintenance ThinkCentre User Guide Features Product overview System management features Security features Input/Output I/O featuresPower supply Expansion Preinstalled software programs Preinstalled operating system Software provided by Lenovo SpecificationsSoftware overview Lenovo Welcome Product RecoveryLenovo ThinkVantage Tools Fingerprint Software ThinkVantage Rescue and Recovery ThinkVantage Password ManagerThinkVantage Power Manager ThinkVantage System Update Locations Lenovo Solution CenterAdobe Reader Antivirus software View Manager Front connector, control, and indicator locations Locating connectors on the rear of your computer Connector Description That use a DisplayPort connector Locating components Locating parts on the system board System board part locations System board part locations Locating internal drives Drive bay locations Machine type and model label Machine type and model label Using the keyboard Using your computerFrequently asked questions Using Windows shortcut keys Using the wheel mouse Using the blue ThinkVantage buttonUsing a fingerprint reader Adjusting audio Using CDs and DVDs Setting the volume from the desktopSetting the volume from Control Panel Adding the volume icon to the taskbar Recording a CD or DVD Handling and storing CD and DVD mediaPlaying a CD or DVD Using your computer ThinkCentre User Guide Arranging your workspace Accessibility and comfortYou and your computer Comfort 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 features Security Installing a padlock Locking the computer cover Installing a cable lock Attaching a cable lock Attaching an integrated cable lock Using passwordsBios passwords Using and understanding firewalls Windows passwordsConfiguring the fingerprint reader Protecting data against viruses ThinkCentre User Guide Installing external options Installing or replacing hardwareInstalling or replacing hardware Handling static-sensitive devices Removing the computer cover Removing the computer cover What to do next Removing and reinstalling the front bezelInstalling or replacing a PCI card Opening the PCI card latch Removing a PCI card Installing or replacing a memory module Installing a PCI card Udimm Dimm Installing or replacing the optical drive Opening the retaining clips Removing the optical drive Installing or replacing the card reader Installing the optical drive Installing the card reader Removing the card reader retainer Installing the card reader Replacing the card reader Removing the card reader Replacing the battery Replacing the power supply assembly Removing the old battery ThinkCentre User Guide Replacing the heat sink and fan assembly Removing the screws for the power supply assembly Removing the heat sink and fan assembly Replacing the microprocessor Accessing the microprocessor Installing the microprocessor Installing the solid state drive Installing the solid state drive into the storage converter Installing or replacing the mSATA solid state drive Installing the mSATA solid state drive ThinkCentre User Guide Installing the mSATA solid state drive Replacing the mSATA solid state drive Removing the mSATA solid state drive storage converter Removing the mSATA solid state drive What to do next Replacing the primary hard disk drive Removing the primary hard disk drive Installing the hard disk drive into the bracket Replacing the secondary hard disk drive Removing the secondary hard disk drive Installing the secondary hard disk drive Replacing the front fan assembly Removing the front fan assembly Replacing the rear fan assembly Installing the front fan assembly Removing the rear fan assembly Replacing the front audio and USB assembly Installing the rear fan assembly Replacing the internal speaker Removing the old internal speaker Installing a new internal speaker Replacing the thermal sensor Pull the entire thermal sensor out of the chassis Replacing the cover presence switch Installing the new thermal sensor Removing the cover presence switch Replacing the WiFi units Removing the WiFi adapter card Disconnecting the Bluetooth cable Opening the PCI card latch Removing the WiFi card module Removing the WiFi adapter card Installing the WiFi units Removing the screws that secure the WiFi card module Installing the WiFi card module Installing the WiFi antenna cables Removing the rear WiFi antenna Installing or removing the rear WiFi antennaInstalling the rear WiFi antenna Installing or removing the front WiFi antenna Installing the front WiFi antenna Connect the front antenna cable to the WiFi card module Removing the front WiFi antenna Replacing the keyboard or mouse Completing the parts replacement Connecting the USB keyboard or mouse Reinstalling the computer cover Obtaining device drivers ThinkCentre User Guide Creating 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 Administrator Password Password considerationsPower-On Password Hard Disk Password Erasing lost or forgotten passwords clearing Cmos Enabling or disabling a device Selecting a temporary startup device Enabling ErP compliance modeSelecting a startup device Selecting or changing the startup device sequence ICE thermal alert ICE performance modeDisabled Exiting the Setup Utility program Updating system programs Using system programsUpdating flashing the Bios from a disc 103 Click Download Drivers & Software Click Use Quick Path Updating flashing the Bios from your operating systemRecovering from a POST/BIOS update failure Getting the latest device drivers for your computer Preventing problemsKeeping your computer current Updating your operating system Using System Update Basics Keyboard Cleaning your computerComputer Optical mouse Moving your computer Good maintenance practicesCleaning a glass-screen surface 109 Troubleshooting and diagnosticsBasic troubleshooting Troubleshooting procedure Troubleshooting Audio problems No audio in Windows 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 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 message All or some keys on the keyboard do not work Intermittent problemsKeyboard, mouse, or pointing device problems Mouse or pointing device does not work Pointer on the screen does not move smoothly with the mouse Monitor problemsWireless keyboard does not work Fingerprint reader does not work Wrong characters appear on the screen Image appears to be flickering Image is discolored Networking problemsEthernet problems Your computer cannot connect to the network Adapter stops working for no apparent reason Wake on LAN feature is not workingClick Start Control Panel Click Hardware and Sound Bluetooth problems Wireless LAN problemWireless WAN problem Sound does not come from the Bluetooth headphone An option that previously worked does not work now Option problemsAn option that was just installed does not work Excessive number of fragmented files Performance and lockup problemsInsufficient free hard disk drive space Insufficient memory Printer problemsSerial port problems Click Defragment Now, then click Continue Software problems Software does not work as expected USB problems Lenovo Solution Center ThinkCentre User Guide Getting information, help, and service Calling for service Help and serviceUsing the documentation and diagnostic program Lenovo Support Web site Using other services Purchasing additional services ThinkCentre User Guide Appendix A. Notices 131 Trademarks Electronic emissions notices Appendix B. Regulatory informationExport classification notice Federal Communications Commission Declaration of Conformity ThinkCentre User Guide Additional regulatory information ThinkCentre User Guide Recycling information Appendix C. Weee and recycling informationImportant information for the European Directive 2002/96/EC 137 Battery recycling information for Taiwan Recycling information for Brazil Battery recycling information for the European Union ThinkCentre User Guide Appendix D. Ek Bilgiler 141 ThinkCentre User Guide 143 Appendix E. Servis istasyonlariGaranti Hizmetinin Alınabileceği Merkezler Antalya Erzİncan Iğdir İzmİr Muğla Şanliurfa ThinkCentre User Guide Index 151 Rescue and Recovery workspace 153 ThinkCentre User Guide