Dell D420 specifications

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NOTE: Memory modules purchased from Dell are covered under your computer warranty.

CAUTION: Before you begin any of the procedures in this section, follow the safety instructions in the Product Information Guide.

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

This computer has one memory module connector labeled "DIMM A." To install a memory module in DIMM A:

1.Follow the procedures in Before You Begin.

2.Turn the computer upside-down, loosen the three captive screws on the memory/mini-card module cover, and remove the cover.

3. Ground yourself by touching one of the metal connectors on the back of the computer.

NOTICE: If you leave your work area, ground yourself again when you return to the computer.

4. If you are replacing a memory module, remove the existing module:

NOTICE: To prevent damage to the memory module connector, do not use tools to spread the memory-module securing clips.

a.Use your fingertips to carefully spread apart the securing clips on each end of the memory module connector until the module pops up.

b.Remove the module from the connector.

1

memory module

2

securing clips (2)

 

 

 

 

NOTICE: Insert memory modules at a 45-degree angle to prevent damage to connectors.

NOTE: If the memory module is not installed properly, the computer may not boot properly. No error message indicates this failure.

5.Ground yourself and install the new memory module:

a.Align the notch in the module edge connector with the tab in the connector slot.

b.Slide the module firmly into the slot at a 45-degree angle, and rotate the module down until it clicks into place. If you do not feel the click, remove the module and reinstall it.

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Contents Dell Latitude D420 Users Guide Abbreviations and AcronymsDevice status lights About Your ComputerFront View Fingerprint reader optional Keyboard and network status lightsRight View Audio connectorsLeft View USB connectors Modem connector RJ-11Network connector RJ-45 Video connectorBottom View Back to Contents Cleaning Your Computer AppendixFCC Class B Macrovision Product NoticeFCC Notice U.S. Only Using a Battery Battery PerformanceChecking the Battery Charge Dell QuickSet Battery MeterConserving Battery Power Power Management ModesLow-Battery Warning Standby ModeConfiguring Power Management Settings Charging the BatteryReplacing the Battery Hibernate ModeStoring a Battery Using Cards Installing a PC Card or 34-mm ExpressCardCard Types Card BlanksInstalling a 34-mm Express Card Installing a Smart Card or Secure Digital SD CardInstalling a PC Card Removing a PC Card, 34-mm Express Card, or Blank Back to Contents Using the Display Adjusting BrightnessSwitching the Video Image Setting Display Resolution and Refresh RateSwapping Primary and Secondary Displays Finding Information What Are You Looking For? Find It HereService Tag and Microsoft Windows License GuidesDell Support Website support.dell.com Select Drivers & Downloads and click GoOperating System CD Glossary Device driver See driver Docking device See APRPage Page NIC See network adapter Page Video resolution See resolution System tray See notification areaBack to Contents Online Services Getting HelpObtaining Assistance Ftp.dell.comProblems With Your Order AutoTech ServiceAutomated Order-Status Service Support ServiceDiagnostics Checklist Before You CallContacting Dell Antigua and BarbudaAruba Australia Sydney0011 Website support.euro.dell.comChina Xiamen ColombiaCosta Rica Czech Republic PragueFrance Paris Montpellier CorporateGermany Langen GreeceGeneral Italy MilanJamaica Website support.jp.dell.comMacao Website support.ap.dell.com Malaysia PenangMexico MontserratPuerto Rico St. Kitts and NevisSt. Lucia St. VincentWebsite support.ap.dell.com Taiwan 002Website support.ap.dell.com Thailand Trinidad/TobagoVirgin Islands VenezuelaKey Combinations Using the Keyboard and Touch PadNumeric Keypad Power Management Touch PadFingerprint Reader optional Speaker FunctionsMouse Properties window Changing the Track-Stick CapCustomizing the Touch Pad and Track Stick Page Setting Up a Network Physically Connecting to a Network or Broadband ModemNetwork Setup Wizard Wireless Local Area Network WlanWhat You Need to Establish a Wlan Connection Checking Your Wireless Network CardSetting Up a New Wlan Connecting to a Wireless Local Area Network Determining the Wireless Network Device ManagerMobile Broadband or Wireless Wide Area Network Wwan Enabling/Disabling the Wireless Network CardConnecting to a Mobile Broadband Network Under Pick a Help topic, click Dell User and System GuidesDell Wi-Fi Catcher Network Locator Internet Connection FirewallAdding and Replacing Parts Before You BeginRecommended Tools Turning Off Your ComputerHard Drive Removing the Hard Drive Dismantling the Hard Drive Replacing the Hard Drive Hinge CoverKeyboard MemoryPage Wireless Local Area Network Wlan Cards Mini-CardsMobile Broadband Wwan Cards Page Subscriber Identity Module SIM Card Internal Card With Bluetooth Wireless Technology Coin-Cell BatteryBack to Contents Dell QuickSet Using Smart Cards PasswordsSecuring Your Computer Security Cable LockUsing a Primary/System Password Using an Administrator PasswordUsing a Hard Drive Password Trusted Platform Module TPMEnabling the TPM Feature Using the Security Management SoftwareSecurity Management Software Activating the Security Management SoftwareComputer Tracking Software If Your Computer Is Lost or StolenSystem Setup Program Viewing the System Setup ScreensSystem Setup Screens Commonly Used SettingsPerforming a One-Time Boot Changing COM PortsEnabling the Infrared Sensor Locate Fast IR under Onboard DevicesPage Reinstalling Software What Is a Driver?Reinstalling Drivers and Utilities DriversUsing the Drivers and Utilities CD Manually Reinstalling DriversSoftware and Hardware Incompatibilities Click Start→ Help and SupportUsing Microsoft Windows XP System Restore Creating a Restore PointUndoing the Last System Restore Restoring Your Operating SystemUsing the Operating System CD Enabling System RestoreReinstalling Windows XP Before You BeginSpecifications Communications VideoAudio DisplayBattery AC AdapterPhysical EnvironmentalAbbreviations and Acronyms Start the Files and Settings Transfer Wizard Transferring Information to a New ComputerClick Files and Settings Transfer Wizard Back to Contents Traveling With Your Computer Identifying Your ComputerPacking the Computer Travel TipsBack to Contents Troubleshooting Dell Technical Update ServiceDell Diagnostics When to Use the Dell DiagnosticsDell Diagnostics Main Menu Option FunctionDrive Problems Accessing the Dell Support UtilityDell Support Utility Clicking the Dell Support IconCD and DVD drive problems Hard drive problemsProblems writing to a CD/DVD-RW drive If you hear an unfamiliar scraping or grinding soundVerify that the modem is communicating with Windows Mail, Modem, and Internet ProblemsError Messages Page Click Start→ Control Panel→ Add or Remove Programs External Keyboard problems Ieee 1394 Device ProblemsKeyboard Problems Lockups and Software Problems Unexpected charactersComputer does not start up Computer stops respondingMemory Problems Network ProblemsOther software problems Solid blue screen appearsPC Card or ExpressCard Problems Wireless Local Area Network WlanMobile Broadband Network Restart the computer and log on to the network againDocking Power Considerations Power ProblemsEnsuring Sufficient Power for Your Computer Printer Problems Scanner ProblemsAC Power Loss While the Computer Is Docked Docking While the Computer Is RunningSound and Speaker Problems Touch Pad or Mouse ProblemsNo sound from headphones No sound from integrated speakersIf the display is difficult to read Video and Display ProblemsIf the display is blank Adjust the Windows display settings If only part of the display is readableClick Start→ Control Panel→ Appearance and Themes Connect an external monitor
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