Dell D420 specifications Printer Problems, Scanner Problems, Docking While the Computer Is Running

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normal computer operation is not possible on battery power alone. Ensure that the AC adapter is connected to your computer when the computer is docked to a docking device.

Docking While the Computer Is Running

If your computer is connected to the Dell D/Port while the computer is running, presence of the docking device is ignored until the AC adapter is connected to the computer.

AC Power Loss While the Computer Is Docked

If your computer loses AC power while docked to the Dell D/Port, the computer immediately goes into low-performance mode.

Printer Problems

Fill out the Diagnostics Checklist (see Diagnostics Checklist) as you complete these checks.

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

NOTE: If you need technical assistance for your printer, contact the printer's manufacturer.

Ensure that the printer is turned on

Check the printer cable connections —

•See the printer documentation for cable connection information.

•Ensure that the printer cables are securely connected to the printer and the computer.

Test the electrical outlet — Ensure that the electrical outlet is working by testing it with another device, such as a lamp.

Verify that the printer is recognized by Windows —

1.Click Start→ Control Panel→ Printers and Other Hardware→ View installed printers or fax printers.

2.If the printer is listed, right-click the printer icon.

3.Click Properties→ Ports. For a parallel printer, ensure that the Print to the following port(s): setting is LPT1 (Printer Port). For a USB printer, ensure that the Print to the following port(s): setting is USB.

Reinstall the printer driver — See the printer documentation for instructions.

Scanner Problems

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

NOTE: If you need technical assistance for your scanner, contact the scanner's manufacturer.

Check the scanner documentation — See the scanner documentation for setup and troubleshooting information.

Unlock the scanner — Ensure that your scanner is unlocked if it has a locking tab or button.

Restart the computer and try the scanner again

Check the cable connections —

•See the scanner documentation for cable connection information.

•Ensure that the scanner cables are securely connected to the scanner and the computer.

Verify that the scanner is recognized by Microsoft Windows — Click Start→ Control Panel→ Printers and Other Hardware→ Scanners and Cameras. If

your scanner is listed, Windows recognizes the scanner.

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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 responding Network Problems Memory Problems Other 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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