Dell LT System manual Trouble With Communication

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From the Start menu, select Settings - Printers to confirm your printer is installed here. If not, click Add Printer to install your printer.

See also the Windows Help.

Question: Why doesn't the device connected to the RS-232C serial port function?

∙Confirm the device is correctly connected to the external floppy disk drive with an appropriate cable.

∙Confirm the external floppy disk drive unit is connected correctly.

∙Confirm the application program is compliant with the RS-232C standard interface.

∙Confirm the COM1 port is not disabled using the following procedure.

1.In the System Properties dialog box, select Device Manager.

2.Double-clickPorts (COM&LPT); then double-clickCommunications Port (COM1).

3.Make sure the item Disable in this hardware profile is unchecked.

∙Confirm the COM 1 port is not used by another applications.

∙Confirm the item Serial Port is set appropriately in the Advanced menu of the Setup Utility.

Trouble With Communication

Question: Why can't I communicate through the built-in IR port?

∙Confirm the IR port of your computer is lined up with the IR port of the other device. These ports should be no more than 20 inches (50 cm) apart without any obstacles.

∙Confirm that IR communication is not turned off in the IR dialog box.

∙Confirm the item Mode of IR Port is set to IrDA in the Advanced menu of the Setup Utility.

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Turn off power management both in the Windows and the Setup Utility.

Do not use the IR port under intense fluorescent light or near cellular phones.

B-6 Dell Latitude LT System User’s Guide

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Contents

Dell Latitude LT System Trademarks EditionCopyright FCC Statement Declaration of ConformityAbout the Modem Copyright Viii Blue Neutral Brown Live Page CE Notice Class B for typical domestic areasXii Safety Precautions GeneralLocation UsageBattery Pack Precautions HandlingCharging DischargingModem Precautions Recording Important Information Manual Conventions Xviii Overview of Computer FrontRight Left Rear Bottom Xxii Table of Contents Security Features Quick Setup Turning Power OnDell Latitude LT System User’s Guide Setting Up the Windows Operating System Properties Dialog Box in WindowsShutting Down the System Choosing Power Source About the Power IndicatorsIndicator Light Meaning Basic OperationsResetting the System Using the AC AdapterWarm Boot Power SwitchUsing the Glide Pad Reset SwitchUsing the Glide Pad Place Your FingertipMove Your Fingertip Click, Double-click, and Right-clickUsing the Keyboard Changing the ConfigurationScroll Windows Logo KeysUsing External Floppy Disk Drive Unit Connecting External Floppy Disk Drive UnitRemoving External Floppy Disk Drive Unit Handling Floppy DisksRemoving Inserting and Removing a Floppy DiskInserting Formatting a Floppy Disk Backing Up DataDell Latitude LT System User’s Guide Battery and Power Management Standard Battery PackChecking the Battery Level Low Battery Indication Charging the Battery PackInitializing the Battery Pack Changing the Battery Pack Optional External Battery Pack Connecting External Battery PackRemoving External Battery Pack Initializing External Battery Pack Disposing of the BatteryCharging External Battery Pack Power Management Stopping Power Supply to the Hard DiskStopping Power Supply to the Display Setting in the Setup UtilityEntering the Suspend Modes Suspend ModesBefore Suspending the System Resuming From Suspend-to-RAM Mode Resuming From Suspend-to-Disk ModeDisabling Power Management Setup UtilityDell Latitude LT System User’s Guide Peripherals Using PeripheralsConnecting a Peripheral Device Peripheral Connection Overview PC Card Inserting a PC CardEjecting a PC Card Keyboard/Mouse Connecting the Optional External CD-ROM DriveUsing a PS/2 Mouse Displaying the Screen on an External Monitor Using a Serial MouseDisplay Resolutions and Colors you can choose Switching the DisplayChanging Resolution and Number of Colors Connecting Audio Equipment Connecting MicrophoneTo output the computer’s audio signal to audio equipment Audio SystemSetting the Setup Utility Installing a Printer DriverUSB Device PrinterRS-232C Device Infrared Communication Setting for Infrared CommunicationCommunication Functions IR Mode Logical PortTurning Off the IR Communication Communicating With a Personal ComputerConnecting the Modem to a Telephone Line Built-in Modem not available in some countriesSetting Communication Information Setting Communications SoftwareSecurity Features PasswordsSupervisor Password and User Password When setting items in the Setup UtilitySetting the Password Deleting the PasswordIf you use the computer personally If you share the computer with othersPreventing Infection of Computer Viruses Security Slot Setup Utility Running the Setup UtilityContents of the Setup Utility Entering and Exiting the Setup UtilityUsing the Setup Utility Main Menu Advanced Menu Security Menu Power Menu Power Down after, Video Power Down after and Auto SuspendExit Menu Built-in modem may not be available in some countriesDell Latitude LT System User’s Guide World Wide Web Getting HelpHelp Tools AutoTech Service Ftp.dell.comSupport@us.dell.com Sales@dell.comAutomated Order-Status System TechFax ServiceTechConnect BBS Technical Support Service Problems With Your OrderContacting Dell Before You CallInternational Country Country City Access Code City Code International Dialing CodesAustria Vienna Dell Contact NumbersAustralia Sydney Canada North York, Ontario Belgium BrusselsBrunei Chili Santiago China XiamenCzech Republic Prague Denmark HorsholmGermany Langen Finland HelsinkiFrance Paris/Montpellier Hong Kong Ireland BrayItaly Milan Japan KawasakiKorea Seoul Latin AmericaMalaysia Penang LuxembourgMacau New Zealand Mexico Colonia GranadaNetherlands Amsterdam Singapore Singapore Norway LysakerPoland Warsaw Sweden Upplands Vasby South Africa JohannesburgSpain Madrid Thailand Switzerland GenevaTaiwan Dell Home and Small Business Group BracknellA. Austin, Texas Spare Parts Sales Toll free DellWare Dell Latitude LT System User’s Guide Cleaning the Computer Maintenance and SpecificationsMaintenance Traveling With the Computer Specifications Parts SpecificationsOptions Troubleshooting Common Problems Trouble When Starting Question Why doesnt the power switch function?Question Why is the screen blank? Trouble With DisplayTrouble With Hard Disk Trouble With Floppy DisksTrouble With Keyboard/Glide Pad Trouble With PeripheralsTrouble With Communication Question Why is the date and/or time incorrect? Other TroublesDell Latitude LT System User’s Guide Limited One-Year Warranty U.S. and Canada Only General Provisions Total Satisfaction Return Policy U.S. and Canada Only Dell Latitude LT System User’s Guide Additional Information Previous ProductsSoftware Dell Latitude LT System User’s Guide Index IndexDell Latitude LT System User’s Guide Year 2000 compliance, C-5