Lenovo 9623, 9705, 9625, 9421, 9353, 9485, 7061, 7090, 3656, 9795, 9935, 9953, 9946 Install a new battery

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This section provides instructions on how to replace the battery.

Your computer has a special type of memory that maintains the date, time, and settings for built-in features, such as parallel-port assignments (configuration). A battery keeps this information active when you turn off the computer.

The battery normally requires no charging or maintenance throughout its life; however, no battery lasts forever. If the battery fails, the date, time, and configuration information (including passwords) are lost. An error message is displayed when you turn on the computer.

Refer to the “Lithium battery notice” in the ThinkCentre Safety and Warranty Guide for information about replacing and disposing of the battery.

To replace the battery:

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.Remove the computer cover. See “Removing the computer cover” on page 16.

3.Locate the battery. See “Locating parts on the system board” on page 12.

4.Remove the old battery.

Figure 13. Removing the old battery

5.Install a new battery.

Figure 14. Installing a new battery

6.Reinstall the computer cover and connect the cables. See “Completing the parts replacement” on page 45.

Note: When the computer is turned on for the first time after replacing the battery, an error message might be displayed. This is normal after replacing the battery.

7.Turn on the computer and all attached devices.

8.Use the Setup Utility program to set the date, time, and any passwords. See Chapter 4, “Using the Setup Utility,” on page 59.

Chapter 2. Installing or replacing hardware 23

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Contents ThinkCentre User Guide Page ThinkCentre User Guide Second Edition December Copyright Lenovo 2008 Contents Index Important safety information Vi User Guide Product overview FeaturesConnectivity Security features Environment SpecificationsSoftware provided with your Windows operating system Software overviewLenovo ThinkVantage Toolbox Antivirus software Locations Locating connectors on the front of your computerRear connector locations Locating connectors on the rear of your computerConnector Description Component locations Locating componentsLocating internal drives Locating parts on the system boardShows the locations of the drive bays User Guide Handling static-sensitive devices Installing or replacing hardwareInstalling or replacing hardware Installing external optionsRemoving the computer cover Removing the computer cover Installing or replacing a PCI card Removing and reinstalling the front bezelOpening the PCI card latch What to do next Opening the retaining clips Installing or replacing a memory moduleRemoving the memory module Replacing the batteryInstall a new battery Removing the retaining screws for the power supply assembly Replacing the power supply assemblyReplacing the heat sink and fan assembly Removing the heat sink and fan assembly Replacing the primary hard disk drive Replacing the heat sink and fan assemblyRemoving the primary hard disk drive Installing the primary hard disk drive into the bracket Replacing the secondary hard disk drive Installing the primary hard disk drive and bracketRemoving the secondary hard disk drive Installing the secondary hard disk drive into the bracket Replacing the optical drive Installing the secondary hard disk drive and drive cageRemoving the optical drive Replacing the diskette drive or card reader Removing the diskette drive or card reader Removing the front fan assembly Replacing the front fan assemblyInstalling the front fan assembly Replacing the rear fan assemblyRemoving the rear fan assembly Installing the rear fan assembly Replacing the front audio and USB assemblyRemoving the front audio and USB assembly Removing the old internal speaker Replacing the internal speakerReplacing the keyboard Installing a new internal speakerKeyboard connectors Replacing the mouse Completing the parts replacementReinstalling the computer cover Installing security featuresIntegrated cable lock Integrated cable lockErasing lost or forgotten passwords clearing Cmos Password protectionPadlock Installing or replacing hardware User Guide Creating and using recovery media Recovery informationCreating recovery media Using recovery media Performing a backup operation Performing backup and recovery operationsPerforming a recovery operation Using the Rescue and Recovery workspace Creating rescue media Creating and using rescue mediaCreating and using a recovery repair diskette Using rescue mediaUsing a recovery repair diskette Creating a recovery repair disketteInstalling or reinstalling device drivers Solving recovery problems Setting a rescue device in the startup sequenceUsing passwords Using the Setup UtilityStarting the Setup Utility program Viewing and changing settingsSetting, changing, and deleting a password Password considerationsUser Password Administrator PasswordSelecting a temporary startup device Selecting a startup deviceSelecting or changing the startup device sequence Exiting from the Setup Utility programUpdating flashing the Bios from a diskette or disc Using system programsUpdating system programs Recovering from a POST/BIOS update failure Updating flashing the Bios from your operating systemUpdating system programs User Guide Basic troubleshooting Troubleshooting and diagnosticsLenovo ThinkVantage Toolbox Diagnostic programsLenovo System Toolbox PC-Doctor for Rescue and RecoveryPC-Doctor for DOS Cleaning the mouseOptical mouse Non-optical mouse User Guide Lenovo ThinkVantage Tools Getting information, help, and serviceInformation resources Online Books folderLenovo Welcome Access HelpSafety and Warranty ThinkVantage Productivity CenterUsing the documentation and diagnostic programs Help and serviceCalling for service Purchasing additional services Using other servicesAppendix. Notices Trademarks Television output noticeCRU IndexPower Page User Guide Page Part Number 89Y0418
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