Lenovo 3091 Removing or reinstalling the Vesa frame cover, Removing the rear I/O assembly cover

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3.Remove the computer cover. See “Removing the computer cover” on page 15.

4.Locate the rear I/O assembly cover. See “Component locations” on page 11.

5.Carefully release the bottom of the rear I/O assembly cover from the computer front bezel and then release the top of the rear I/O assembly cover from the computer VESA frame cover.

Figure 9. Removing the rear I/O assembly cover

6.To reinstall the rear I/O assembly cover, engage the bottom of the rear I/O assembly cover with the computer front bezel and then press the top of the rear I/O assembly cover downward until it snaps into place.

What to do next:

•To work with another piece of hardware, go to the appropriate section.

•To complete the installation or replacement, go to “Completing the parts replacement” on page 52.

Removing or reinstalling the VESA frame cover

To remove or reinstall the VESA frame cover, do the following:

1.Remove all media from the drives and turn off all attached devices and the computer. Then, disconnect all power cords from electrical outlets and disconnect all cables that are connected to the computer.

2.Place a soft, clean towel or cloth on the desk or surface. Hold the sides of your computer and gently lay it down so that the screen is against the surface and the cover is facing up.

3.Remove the computer cover. See “Removing the computer cover” on page 15.

4.Remove the rear I/O assembly cover from the rear I/O assembly. See “Removing or reinstalling the rear I/O assembly cover” on page 19.

5.Remove the frame stand or lift stand. See “Removing or reinstalling the frame stand” on page 16 or “Removing or reinstalling the lift stand” on page 17.

20ThinkCentre User Guide

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Contents ThinkCentre User Guide Page ThinkCentre User Guide Second Edition May Copyright Lenovo Contents Appendix A. Notices Important safety information Vi ThinkCentre User Guide Features Product overviewConnectivity Copyright Lenovo Specifications Operating system edition Supported touch featureComputer weight Software overview Software provided with your Windows operating systemLocating computer controls, connectors, and parts Lenovo ThinkVantage ToolboxUsing your computer in monitor mode Front viewRear view Icon Control DescriptionConnector Description Component locations Component locationsSystem board part and connector locations System board part and connector locationsProduct overview ThinkCentre User Guide Installing or replacing hardware Installing or replacing hardwareInstalling external options Installing a computer wall mountRemoving or reinstalling the frame stand Removing the computer coverRemoving or reinstalling the lift stand What to do nextRemoving the lift stand Removing or reinstalling the rear I/O assembly cover Reinstalling the lift standRemoving or reinstalling the Vesa frame cover Removing the rear I/O assembly coverRemoving or reinstalling the Vesa frame Removing the Vesa frame coverInstalling or replacing a memory module Removing the computer Vesa frameRemoving the memory module Replacing the battery Removing the batteryInstalling a new battery Replacing the hard disk driveRemoving the hard disk drive Installing the hard disk drive Replacing the optical drive Removing the optical driveInstalling the optical drive Replacing the heat sinkRemoving the fan duct Removing the heat sink Replacing the microprocessor Removing the microprocessor Replacing the WI-FI card Installing the microprocessorReplacing the Bluetooth module Removing the WI-FI cardRemoving the Bluetooth module Replacing the multi-touch boardReplacing the ambient light sensor Removing the multi-touch boardRemoving the ambient light sensor Replacing the ExpressCard Removing the ExpressCardReplacing the internal speakers Removing the internal speakersReplacing the integrated camera with microphone Replacing the microprocessor fan assembly Removing the integrated camera with microphoneRemoving the microprocessor fan assembly Replacing the card reader Removing the card readerReplacing the rear I/O assembly Removing the rear I/O assemblyReplacing the right I/O assembly Removing the right I/O assemblyReplacing the power supply Removing the power supply Replacing the keyboard Replacing the PS/2 or USB keyboardReplacing the mouse Replacing the PS/2 or USB mouseReplacing the wireless mouse Completing the parts replacement Obtaining device drivers Basic security features Integrated cable lockPassword protection Erasing lost or forgotten passwords clearing CmosInstalling or replacing hardware ThinkCentre User Guide Recovery information Creating and using recovery mediaCreating recovery media Using recovery mediaPerforming backup and recovery operations Performing a backup operationPerforming a recovery operation Using the Rescue and Recovery workspaceCreating and using a rescue medium Creating a rescue mediumUsing a rescue medium Installing or reinstalling device driversSolving recovery problems Using the Setup Utility program Starting the Setup Utility programViewing or changing settings Using passwordsPassword considerations Administrator passwordPower-on password Hard disk drive passwordEnabling or disabling a device Selecting a startup deviceSelecting a temporary startup device Viewing or changing the startup device sequenceExiting the Setup Utility program Updating flashing the Bios from a disc Using system programsUpdating system programs Updating flashing the Bios from your operating system Recovering from a POST/BIOS update failureUpdating system programs ThinkCentre User Guide Troubleshooting and diagnostic programs Basic troubleshootingDiagnostic programs Lenovo ThinkVantage ToolboxPC-Doctor for Rescue and Recovery PC-Doctor for DOSCleaning an optical mouse Getting information, help, and service Information resourcesOnline Books folder Lenovo ThinkVantage ToolsSafety and warranty Access HelpLenovo Welcome Copyright Lenovo Using other services Purchasing additional servicesAppendix A. Notices Television output notice European conformance CE mark TrademarksIndex CRULenovo ThinkVantage Toolbox Solving recovery problems ThinkCentre User Guide Page 89Y8034

852, 800, 3091, 3429, 5248 specifications

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