Back to Contents | Dell D420 specification

memory module/WLAN Mini-Card cover — Covers the compartment that contains one memory module and the WLAN Mini-Card. For additional information, see Adding and Replacing Parts.

battery-bay latch release — Releases the battery. See Using a Battery for instructions.

battery charge gauge — Provides information on the battery charge. For more information, see Using a Battery.

battery — When a battery is installed, you can use the computer without connecting the computer to an electrical outlet. For more information, see Using a Battery.

docking device slot — Lets you attach your computer to a docking device. See the documentation that came with your docking device for additional information.

NOTICE: Your computer features Dell Undock & Go™ technology that allows you to undock your computer without going into standby mode. Because the computer may not automatically go into standby mode when it is undocked, be sure the settings in the Power Options control panel do not prohibit the computer from going into standby mode. If you change the Power Options control panel to prohibit the computer from going into standby mode, you greatly increase the chances of causing your battery to wear down quickly or causing your computer to overheat.

air vent — The computer uses an internal fan to create airflow through the vents, which prevents the computer from overheating.

NOTE: The computer turns on the fan when the computer gets hot. Fan noise is normal and does not indicate a problem with the fan or the computer.

CAUTION: Do not block, push objects into, or allow dust to accumulate in the air vents. Do not store your computer in a low-airflow environment, such as a closed briefcase, while it is running. Restricting the airflow can damage the computer or cause a fire.

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Contents

Abbreviations and Acronyms Dell Latitude D420 Users Guide Front View About Your ComputerDevice status lights Keyboard and network status lights Fingerprint reader optional Left View Audio connectorsRight View Video connector USB connectorsModem connector RJ-11 Network connector RJ-45 Bottom View Back to Contents Appendix Cleaning Your Computer FCC Notice U.S. Only Macrovision Product NoticeFCC Class B Dell QuickSet Battery Meter Using a BatteryBattery Performance Checking the Battery Charge Standby Mode Conserving Battery PowerPower Management Modes Low-Battery Warning Hibernate Mode Configuring Power Management SettingsCharging the Battery Replacing the Battery Storing a Battery Card Blanks Using CardsInstalling a PC Card or 34-mm ExpressCard Card Types Installing 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 Setting Display Resolution and Refresh Rate Using the DisplayAdjusting Brightness Switching the Video Image Swapping Primary and Secondary Displays What Are You Looking For? Find It Here Finding Information Select Drivers & Downloads and click Go Service Tag and Microsoft Windows LicenseGuides Dell Support Website support.dell.com Operating 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 resolution Back to Contents Ftp.dell.com Online ServicesGetting Help Obtaining Assistance Support Service Problems With Your OrderAutoTech Service Automated Order-Status Service Antigua and Barbuda Diagnostics ChecklistBefore You Call Contacting Dell Website support.euro.dell.com ArubaAustralia Sydney 0011 Czech Republic Prague China XiamenColombia Costa Rica Greece France Paris MontpellierCorporate Germany Langen Website support.jp.dell.com GeneralItaly Milan Jamaica Montserrat MacaoWebsite support.ap.dell.com Malaysia Penang Mexico St. Vincent Puerto RicoSt. Kitts and Nevis St. Lucia Trinidad/Tobago Website support.ap.dell.com Taiwan002 Website support.ap.dell.com Thailand Venezuela Virgin Islands Numeric Keypad Using the Keyboard and Touch PadKey Combinations Speaker Functions Power ManagementTouch Pad Fingerprint Reader optional Customizing the Touch Pad and Track Stick Changing the Track-Stick CapMouse Properties window Page Wireless Local Area Network Wlan Setting Up a NetworkPhysically Connecting to a Network or Broadband Modem Network Setup Wizard Setting 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 Network Under Pick a Help topic, click Dell User and System Guides Mobile Broadband or Wireless Wide Area Network WwanEnabling/Disabling the Wireless Network Card Connecting to a Mobile Broadband Network Internet Connection Firewall Dell Wi-Fi Catcher Network Locator Turning Off Your Computer Adding and Replacing PartsBefore You Begin Recommended Tools Hard Drive Removing the Hard Drive Dismantling the Hard Drive Hinge Cover Replacing the Hard Drive Memory KeyboardPage Mini-Cards Wireless Local Area Network Wlan Cards Mobile Broadband Wwan Cards Page Subscriber Identity Module SIM Card Coin-Cell Battery Internal Card With Bluetooth Wireless Technology Back to Contents Dell QuickSet Security Cable Lock Using Smart CardsPasswords Securing Your Computer Trusted Platform Module TPM Using a Primary/System PasswordUsing an Administrator Password Using a Hard Drive Password Activating the Security Management Software Enabling the TPM FeatureUsing the Security Management Software Security Management Software If Your Computer Is Lost or Stolen Computer Tracking Software Commonly Used Settings System Setup ProgramViewing the System Setup Screens System Setup Screens Locate Fast IR under Onboard Devices Performing a One-Time BootChanging COM Ports Enabling the Infrared SensorPage Drivers Reinstalling SoftwareWhat Is a Driver? Reinstalling Drivers and Utilities Click Start→ Help and Support Using the Drivers and Utilities CDManually Reinstalling Drivers Software and Hardware Incompatibilities Restoring Your Operating System Using Microsoft Windows XP System RestoreCreating a Restore Point Undoing the Last System Restore Before You Begin Using the Operating System CDEnabling System Restore Reinstalling Windows XP Specifications Display CommunicationsVideo Audio AC Adapter Battery Environmental Physical Abbreviations and Acronyms Transferring Information to a New Computer Start the Files and Settings Transfer Wizard Click Files and Settings Transfer Wizard Back to Contents Travel Tips Traveling With Your ComputerIdentifying Your Computer Packing the Computer Back to Contents When to Use the Dell Diagnostics TroubleshootingDell Technical Update Service Dell Diagnostics Option Function Dell Diagnostics Main Menu Clicking the Dell Support Icon Drive ProblemsAccessing the Dell Support Utility Dell Support Utility If you hear an unfamiliar scraping or grinding sound CD and DVD drive problemsHard drive problems Problems writing to a CD/DVD-RW drive Error 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 Computer stops responding Lockups and Software ProblemsUnexpected characters Computer does not start up Solid blue screen appears Memory ProblemsNetwork Problems Other software problems Restart the computer and log on to the network again PC Card or ExpressCard ProblemsWireless Local Area Network Wlan Mobile Broadband Network Ensuring Sufficient Power for Your Computer Power ProblemsDocking Power Considerations Docking While the Computer Is Running Printer ProblemsScanner Problems AC Power Loss While the Computer Is Docked No sound from integrated speakers Sound and Speaker ProblemsTouch Pad or Mouse Problems No sound from headphones If the display is blank Video and Display ProblemsIf the display is difficult to read Connect an external monitor Adjust the Windows display settingsIf only part of the display is readable Click Start→ Control Panel→ Appearance and Themes