Lenovo 5485, 3026, 3269, 3039, 5548, 5536, 5391, 5472, 3627, 3491, 3319, 3394, 3149 Removing the front bezel

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1.Turn off the computer and disconnect all power cords from electrical outlets.

2.Open the computer cover. See “Opening the computer cover” on page 12.

3.Remove the front bezel by releasing the three plastic tabs and pivoting the front bezel outward.

Figure 28. Removing the front bezel

4.Pivot the optical drive bay assembly upward to gain access to the internal speaker. See “Accessing the system board components and drives” on page 12.

5.Locate the internal speaker. See “Locating components” on page 8.

6.Disconnect the internal speaker cable and the thermal sensor cable from the internal speaker connector and the thermal sensor connector on the system board. See “Locating parts on the system board” on page 9.

7.Push the two tabs 1 on the bottom of the internal speaker as shown to release the internal speaker, and then lift the internal speaker up to completely remove it from the chassis.

Chapter 2. Installing or replacing hardware 29

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Contents ThinkCentre User Guide Page ThinkCentre User Guide First Edition October Copyright Lenovo Contents Appendix A. Notices Important safety information Viii ThinkCentre User Guide Product overview FeaturesPower supply Preinstalled software programs SpecificationsSoftware provided by Lenovo Software overviewThinkVantage Productivity Center Adobe Reader Locations Locating connectors on the front of your computerAntivirus software Connector Description Locating connectors on the rear of your computerComponent locations Locating componentsSystem board part locations Locating parts on the system boardDrive bay locations Locating internal drivesInstalling or replacing hardware Installing or replacing hardwareInstalling external options Handling static-sensitive devicesOpening the computer cover Accessing the system board components and drivesPivoting the optical drive bay assembly Installing or replacing a memory moduleOpening the retaining clips What to do next Installing or replacing a PCI cardRemoving a PCI card Installing the PCI card Replacing the batteryReplacing the hard disk drive Removing the old batteryRemoving the hard disk drive Replacing the optical drive Installing the hard disk driveRemoving the old optical drive Installing a new optical drive Replacing the power supply assemblyRemoving the retaining screws for the power supply assembly Replacing the heat sink Removing the power supply assemblyRemoving the heat sink Replacing the front audio and USB assembly Removing the front bezel Replacing the system fanRemoving the system fan Replacing the internal speakerRemoving the front bezel Removing the internal speaker Replacing the keyboard or mouse Installing the new internal speakerConnecting a new keyboard or mouse Completing the parts replacementIntegrated cable lock Installing security featuresErasing lost or forgotten passwords clearing Cmos Password protectionCreating and using recovery media Recovery informationCreating recovery media Performing backup and recovery operations Using recovery mediaPerforming a backup operation Using the Rescue and Recovery workspace Performing a recovery operationCreating a rescue medium Creating and using a rescue mediumInstalling or reinstalling device drivers Using a rescue mediumSolving recovery problems Starting the Setup Utility program Using the Setup UtilityViewing and changing settings Using passwordsAdministrator Password Power-On PasswordHard Disk Password Setting, changing, and deleting a passwordSelecting a startup device Exiting from the Setup Utility programSelecting a temporary startup device Selecting or changing the startup device sequenceThinkCentre User Guide Updating flashing the Bios from a disc Using system programsUpdating system programs Recovering from a POST/BIOS update failure Updating flashing the Bios from your operating systemBasic troubleshooting Troubleshooting and diagnosticsLenovo ThinkVantage Toolbox Diagnostic programsPC-Doctor for DOS PC-Doctor for Rescue and RecoveryCleaning an optical mouse Information resources Getting information, help, and serviceOnline Books folder Lenovo ThinkVantage ToolsSafety and Warranty Access HelpLenovo Welcome Using the documentation and diagnostic programs Help and serviceCalling for service Purchasing additional services Using other servicesAppendix A. Notices European conformance CE mark Trademarks Television output noticeCRU IndexRescue and Recovery workspace Page ThinkCentre User Guide Page 71Y7175