Dell D420 Mobile Broadband (WWAN) Cards

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4. Install the WLAN card:

a. Move any antenna cables out of the way to make space for the WLAN card.

b. Align the WLAN card with the connector at a 45-degree angle, and press the card down into the securing clips until the card clicks into place.

c. Connect the antenna cables to the antenna connectors on the WLAN card by matching the color of the cable to the color of the triangle above

the connector. Connect the main antenna cable (white) to the antenna connector with the white triangle. Connect the auxiliary antenna cable

(black) to the antenna connector with the black triangle.

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5. Connect the antenna cables to the WLAN card, ensuring that you route the cables correctly.

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6. Replace the memory/Mini-Card module cover.

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Mobile Broadband (WWAN) Cards

If you ordered a Mobile Broadband card with your computer, the card is already installed.

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1. If a Mobile Broadband card is not already installed, go to step 5. If you are replacing a Mobile Broadband card, remove the existing card:

1

metal securing clips (2)

2

WLAN card

NOTICE: The connectors are keyed to ensure correct insertion. If you feel resistance, check the connectors and realign the card.

NOTE: Do not insert a Mobile Broadband (WWAN) network card into the WLAN card connector.

NOTICE: To avoid damaging the WLAN card, never place cables on top of or under the card.

NOTE: The WLAN card may have two or three antenna connectors, depending on the type of card you ordered.

NOTE: For more specific information about which cable to connect to which connector, see the documentation that came with your WLAN card.

NOTE: If your computer has a gray cable, connect it to the connector with the gray triangle, if one is available on your card.

NOTE: Mobile Broadband cards may not be available in all regions.

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

Contents

Main DellLatitudeD420User'sGuide Notes, Notices, and Cautions Abbreviations and Acronyms About Your Computer DellLatitudeD420User'sGuide Front View Page Left View Right View Back View Bottom View Page Appendix Cleaning Your Computer Computer, Keyboard, and Display Touch Pad Floppy Drive Macrovision Product Notice FCC Notice (U.S. Only) FCC Class B Using a Battery Battery Performance Checking the Battery Charge DellQuickSetBatteryMeter MicrosoftWindowsPower Meter Conserving Battery Power Power Management Modes Standby Mode Hibernate Mode Configuring Power Management Settings Charging the Battery Replacing the Battery Storing a Battery Using Cards Card Types Card Blanks Extended Cards Installing a PC Card or 34-mm ExpressCard Installing a Smart Card or Secure Digital (SD) Card Removing a PC Card, 34-mm Express Card, or Blank Page Using the Display Adjusting Brightness Switching the Video Image Setting Display Resolution and Refresh Rate Dual Independent Display Mode Swapping Primary and Secondary Displays Finding Information DellLatitudeD420User'sGuide Drivers and Utilities CD (also known as ResourceCD) Quick Reference Guide DellProductInformationGuide Service Tag and MicrosoftWindowsLicense Dell Support Website support.dell.com Dell Support Utility Windows Help and Support Center Dell QuickSet Help Operating System CD Glossary A B C D E F G H I K L M N O P R S T U V W X Z Getting Help Obtaining Assistance Online Services AutoTech Service Automated Order-Status Service Problems With Your Order Product Information Returning Items for Warranty Repair or Credit Before You Call Contacting Dell Page Page Page Page Page Page Page Page Using the Keyboard and Touch Pad DellLatitudeD420User'sGuide Numeric Keypad Key Combinations System Functions Touch Pad Fingerprint Reader (optional) Customizing the Touch Pad and Track Stick Changing the Track-Stick Cap Page Setting Up a Network Physically Connecting to a Network or Broadband Modem Network Setup Wizard Wireless Local Area Network (WLAN) What You Need to Establish a WLAN Connection Checking Your Wireless Network Card Start Button and Connect To Option The Order Confirmation for Your Computer Setting Up a New WLAN Connecting to a Wireless Local Area Network Determining the Wireless Network Device Manager Completing the Connection to the WLAN Enabling/Disabling the Wireless Network Card MonitoringtheStatusofWirelessNetworkConnectionsThroughDellQuickSet Mobile Broadband or Wireless Wide Area Network (WWAN) What You Need to Establish a Mobile Broadband Network Connection Connecting to a Mobile Broadband Network DellWi-FiCatcherNetworkLocator Internet Connection Firewall Adding and Replacing Parts Before You Begin Recommended Tools Turning Off Your Computer Before Working Inside Your Computer Hard Drive Removing the Hard Drive Dismantling the Hard Drive Replacing the Hard Drive Hinge Cover Keyboard Memory Page Mini-Cards Wireless Local Area Network (WLAN) Cards Mobile Broadband (WWAN) Cards Page Subscriber Identity Module (SIM) Card Internal Card With BluetoothWireless Technology Coin-Cell Battery Page DellQuickSet Securing Your Computer Security Cable Lock Using Smart Cards About Smart Cards Passwords Trusted Platform Module (TPM) Enabling the TPM Feature Security Management Software Activating the Security Management Software Using the Security Management Software Computer Tracking Software If Your Computer Is Lost or Stolen System Setup Program Overview Viewing the System Setup Screens System Setup Screens Commonly Used Settings Changing COM Ports Enabling the Infrared Sensor Page Reinstalling Software Drivers What Is a Driver? Identifying Drivers Reinstalling Drivers and Utilities Software and Hardware Incompatibilities Restoring Your Operating System Using Microsoft Windows XP System Restore Creating a Restore Point Restoring the Computer to an Earlier Operating State Undoing the Last System Restore Using the Operating System CD Before You Begin Reinstalling Windows XP Specifications Page Page Page Notes, Notices, and Cautions Abbreviations and Acronyms Transferring Information to a New Computer Running the Files and Settings Transfer Wizard With the Operating System CD Running the Files and Settings Transfer Wizard Without the Operating System CD Page Traveling With Your Computer Identifying Your Computer Packing the Computer Travel Tips Traveling by Air Page Troubleshooting Dell Technical Update Service Dell Diagnostics When to Use the Dell Diagnostics Starting the Dell Diagnostics From Your Hard Drive Starting the Dell Diagnostics From the Optional Drivers and Utilities CD Dell Diagnostics Main Menu Dell Support Utility Accessing the Dell Support Utility Clicking the Dell Support Icon Double-Clicking the Dell Support Icon Drive Problems CD and DVD drive problems Problems writing to a CD/DVD-RW drive If you cannot eject the CD, CD-RW, DVD, or DVD+RW drive tray If you hear an unfamiliar scraping or grinding sound Hard drive problems E-Mail, Modem, and Internet Problems Error Messages Page Page IEEE 1394 Device Problems Keyboard Problems External Keyboard problems Unexpected characters Lockups and Software Problems The computer does not start up The computer stops responding A program stops responding or crashes repeatedly A program is designed for an earlier MicrosoftWindows operating system Memory Problems Network Problems General Wireless Local Area Network (WLAN) Mobile Broadband Network PC Card or ExpressCard Problems Power Problems Ensuring Sufficient Power for Your Computer Docking Power Considerations Docking While the Computer Is Running AC Power Loss While the Computer Is Docked Printer Problems Scanner Problems Sound and Speaker Problems No sound from integrated speakers No sound from external speakers No sound from headphones Touch Pad or Mouse Problems Video and Display Problems If the display is blank If the display is difficult to read If only part of the display is readable