Dell D420 specifications Internal Card With Bluetooth Wireless Technology, Coin-Cell Battery

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1 metal tabs (2) on SIM card slot 2 SIM card with cut-off corner

NOTE: When you replace the SIM card, ensure that you slide the SIM card under the two metal tabs on the SIM card slot with the cut-off corner of the card facing toward the back of the computer.

Internal Card With Bluetooth® Wireless Technology

CAUTION: Before performing the following procedures, read the safety instructions in your Product Information Guide.

NOTICE: To avoid electrostatic discharge, ground yourself by using a wrist grounding strap or by periodically touching a connector on the back panel of the computer.

NOTICE: To prevent damage to the system board, remove the main battery before you service the computer.

If you ordered an internal card with Bluetooth wireless technology with your computer, it is already installed.

1.Follow the procedures in Before You Begin.

2.Remove the keyboard (see Keyboard).

3.Remove the M2 x 3-mm screw from the card holder and lay the holder aside.

4.Lift the card away from the aligning pin.

5.Disconnect the card cable connector from the card.

1	internal card with Bluetooth wireless	2	card cable	3	M2 x 3-mm
	technology		connector		screw

4	card holder	5	aligning pin

NOTICE: Be careful when removing the card to avoid damaging the card, card cable, or surrounding components.

Coin-Cell Battery

CAUTION: Before performing the following procedures, follow the safety instructions in your Product Information Guide.

NOTICE: To avoid electrostatic discharge, ground yourself by using a wrist grounding strap or by periodically touching a connector on the back panel of the computer.

NOTICE: To prevent damage to the system board, remove the main battery before you service the computer.

1.Follow the procedures in Before You Begin.

2.Remove the keyboard (see Keyboard).

3.Disconnect the coin-cell battery cable connector from the system board connector.

4.Remove the coin-cell battery from the system board.

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Contents Abbreviations and Acronyms Dell Latitude D420 Users GuideFront View About Your ComputerDevice status lights Keyboard and network status lights Fingerprint reader optionalLeft View Audio connectorsRight View Modem connector RJ-11 USB connectorsNetwork connector RJ-45 Video connectorBottom View Back to Contents Appendix Cleaning Your ComputerFCC Notice U.S. Only Macrovision Product NoticeFCC Class B Battery Performance Using a BatteryChecking the Battery Charge Dell QuickSet Battery MeterPower Management Modes Conserving Battery PowerLow-Battery Warning Standby ModeCharging the Battery Configuring Power Management SettingsReplacing the Battery Hibernate ModeStoring a Battery Installing a PC Card or 34-mm ExpressCard Using CardsCard Types Card BlanksInstalling a PC Card Installing a Smart Card or Secure Digital SD CardInstalling a 34-mm Express Card Removing a PC Card, 34-mm Express Card, or Blank Back to Contents Adjusting Brightness Using the DisplaySwitching the Video Image Setting Display Resolution and Refresh RateSwapping Primary and Secondary Displays What Are You Looking For? Find It Here Finding InformationGuides Service Tag and Microsoft Windows LicenseDell Support Website support.dell.com Select Drivers & Downloads and click GoOperating System CD Glossary Docking device See APR Device driver See driverPage Page NIC See network adapter Page System tray See notification area Video resolution See resolutionBack to Contents Getting Help Online ServicesObtaining Assistance Ftp.dell.comAutoTech Service Problems With Your OrderAutomated Order-Status Service Support ServiceBefore You Call Diagnostics ChecklistContacting Dell Antigua and BarbudaAustralia Sydney Aruba0011 Website support.euro.dell.comColombia China XiamenCosta Rica Czech Republic PragueCorporate France Paris MontpellierGermany Langen GreeceItaly Milan GeneralJamaica Website support.jp.dell.comWebsite support.ap.dell.com Malaysia Penang MacaoMexico MontserratSt. Kitts and Nevis Puerto RicoSt. Lucia St. Vincent002 Website support.ap.dell.com TaiwanWebsite support.ap.dell.com Thailand Trinidad/TobagoVenezuela Virgin IslandsNumeric Keypad Using the Keyboard and Touch PadKey Combinations Touch Pad Power ManagementFingerprint Reader optional Speaker FunctionsCustomizing the Touch Pad and Track Stick Changing the Track-Stick CapMouse Properties window Page Physically Connecting to a Network or Broadband Modem Setting Up a NetworkNetwork Setup Wizard Wireless Local Area Network WlanSetting Up a New Wlan Checking Your Wireless Network CardWhat You Need to Establish a Wlan Connection Determining the Wireless Network Device Manager Connecting to a Wireless Local Area NetworkEnabling/Disabling the Wireless Network Card Mobile Broadband or Wireless Wide Area Network WwanConnecting to a Mobile Broadband Network Under Pick a Help topic, click Dell User and System GuidesInternet Connection Firewall Dell Wi-Fi Catcher Network LocatorBefore You Begin Adding and Replacing PartsRecommended Tools Turning Off Your ComputerHard Drive Removing the Hard Drive Dismantling the Hard Drive Hinge Cover Replacing the Hard DriveMemory KeyboardPage Mini-Cards Wireless Local Area Network Wlan CardsMobile Broadband Wwan Cards Page Subscriber Identity Module SIM Card Coin-Cell Battery Internal Card With Bluetooth Wireless TechnologyBack to Contents Dell QuickSet Passwords Using Smart CardsSecuring Your Computer Security Cable LockUsing an Administrator Password Using a Primary/System PasswordUsing a Hard Drive Password Trusted Platform Module TPMUsing the Security Management Software Enabling the TPM FeatureSecurity Management Software Activating the Security Management SoftwareIf Your Computer Is Lost or Stolen Computer Tracking SoftwareViewing the System Setup Screens System Setup ProgramSystem Setup Screens Commonly Used SettingsChanging COM Ports Performing a One-Time BootEnabling the Infrared Sensor Locate Fast IR under Onboard DevicesPage What Is a Driver? Reinstalling SoftwareReinstalling Drivers and Utilities DriversManually Reinstalling Drivers Using the Drivers and Utilities CDSoftware and Hardware Incompatibilities Click Start→ Help and SupportCreating a Restore Point Using Microsoft Windows XP System RestoreUndoing the Last System Restore Restoring Your Operating SystemEnabling System Restore Using the Operating System CDReinstalling Windows XP Before You BeginSpecifications Video CommunicationsAudio DisplayAC Adapter BatteryEnvironmental PhysicalAbbreviations and Acronyms Transferring Information to a New Computer Start the Files and Settings Transfer WizardClick Files and Settings Transfer Wizard Back to Contents Identifying Your Computer Traveling With Your ComputerPacking the Computer Travel TipsBack to Contents Dell Technical Update Service TroubleshootingDell Diagnostics When to Use the Dell DiagnosticsOption Function Dell Diagnostics Main MenuAccessing the Dell Support Utility Drive ProblemsDell Support Utility Clicking the Dell Support IconHard drive problems CD and DVD drive problemsProblems writing to a CD/DVD-RW drive If you hear an unfamiliar scraping or grinding soundError Messages Mail, Modem, and Internet ProblemsVerify that the modem is communicating with Windows Page Click Start→ Control Panel→ Add or Remove Programs Keyboard Problems Ieee 1394 Device ProblemsExternal Keyboard problems Unexpected characters Lockups and Software ProblemsComputer does not start up Computer stops respondingNetwork Problems Memory ProblemsOther software problems Solid blue screen appearsWireless Local Area Network Wlan PC Card or ExpressCard ProblemsMobile Broadband Network Restart the computer and log on to the network againEnsuring Sufficient Power for Your Computer Power ProblemsDocking Power Considerations Scanner Problems Printer ProblemsAC Power Loss While the Computer Is Docked Docking While the Computer Is RunningTouch Pad or Mouse Problems Sound and Speaker ProblemsNo sound from headphones No sound from integrated speakersIf the display is blank Video and Display ProblemsIf the display is difficult to read If only part of the display is readable Adjust the Windows display settingsClick Start→ Control Panel→ Appearance and Themes Connect an external monitor

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