Solving USB Problems | Compaq E500 specification

Solving USB Problems

Problem

Possible Cause		Solution

External device connected to a USB connector does not work

External device connected to USB connector does not work during startup (before Windows 95 loads)

External devices in lower tiers do not work

The operating system limits external devices connected by USB to two tiers which can include no more than two hubs on the first tier and no more than one keyboard and one pointing device on the first or second tier.

During startup, only two tiers are supported by the USB connector. These tiers can include no more than two hubs on the first tier and no more than one keyboard and one pointing device on the first or second tier.

An unpowered hub is connected to another unpowered hub.

Reduce the number of connected external USB devices to no more than two hubs on the first tier, and no more than one keyboard and one pointing device on the first or second tier.

Use the external device only after Windows 95 or Windows 98 has loaded.

Reduce the number of connected external USB devices to no more than two hubs on the first tier, and no more than one keyboard and one pointing device on the first or second tier.

Use only powered hubs.

Make sure that all unpowered hubs are immediately preceded by powered hubs in the USB chain.

IMPORTANT: External USB keyboards will not function until the operating system has been booted.

16-30Troubleshooting

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Compaq E500 specifications Solving USB Problems

Contents

Compaq Armada E500 Getting Started Taking a Look At the Computer Using the Keyboard Using Battery Packs Managing Power Working with Removable Drives Device Bays Using an Internal Modem Available on Select Models Connecting External Devices Using PC Cards Using Audio Features Upgrading the Computer Maintenance & Travel Guidelines Security Features Intelligent Manageability Computer Setup and Diagnostics Utilities Troubleshooting USB Compaq Computer Corporation Contents Using Suspend Standby and Hibernation Setting Power Preferences in Windows 95 Connecting to a Docking Device 10-4 13-1 Appendix a Using this Guide Preface Getting Started Finding Assistance Identifying Packing Box Contents 1Component Identifying Hardware ComponentsFunction Or damage to the equipment Front Components ComputerFront Components Front Components 3Component Left Side Components Left Side Components Right Side Components Right Side ComponentsComponent1 Function Right Side Components Component7 Function Infrared port Composite TV-Out jack Tilt foot Rear Components Rear Components Bottom Components Bottom Components Status Indicator Lights Status Indicator Lights Using the Keyboard Using the Pointing Device Identifying1 TouchPad Components Navigating with the TouchPad TouchPad Procedures Setting TouchPad PreferencesProcedure Task Pointing-Stick Components Navigating with the Pointing-Stick Pointing-Stick Procedures Setting Pointing-Stick Preferences EasyPoint IV pointing stick model Using Hotkeys Hotkeys Quick ReferenceFn+F10 hotkeys, press Scroll Lock⊕Scroll Lock+F10 Task Hotkeys Switching the Image Adjusting System VolumeHotkeys Quick Reference Task Press Fn+F5+M or Setting a Power Conservation Level Viewing Battery StatusAdjusting Panel Contrast Initiating Quick Controls Displaying System Information BrightnessStretching Text Using the Embedded Numeric Keypad Fn+Num Lk Operating the Keypad Keys as Standard Keys Enabling the Keypad at Startup Using Battery Packs Learning About Battery Packs Using a New Battery Pack Charging Battery Packs Inserting and Removing the Primary Battery Pack Removing the Primary Battery Pack Inserting the Primary Battery Pack Storing a Battery Pack Maximizing Battery Pack LifeRecommended Battery Pack Storage Temperatures Storage Time Beeps with a Blinking Battery Charge Light Recycling Used Battery PacksSystem Beeps Beeps with a Blinking Power/Suspend Light Turning Beeps On or Off Selecting a Power Source Managing PowerRecommended Power Source Using Suspend Standby and Hibernation Using Standby Suspend and Hibernation Task Procedure Result Identifying Low-Battery Conditions Managing Low-Battery ConditionsUsing Standby Suspend and Hibernation Task Procedure Managing Power Resolving Low-Battery Conditions If external power is available, do one of the following Charging a Battery Pack If you are charging the battery pack in the computer Using the Battery Status Tab Monitoring the Charge in a Battery PackUsing the Battery Meter or Power Meter Icon Windows 95 and Windows Using the Power or Power Meter TabWindows NT Calibrating a Battery Pack Battery Number Battery Pack Location Running a Calibration Using Power Preferences Stopping a Calibration Procedure from Control Panel Setting Power Preferences Windows 95 and Windows NTPreference 14Managing Power Setting Power Preferences in Windows To access most power preference settings-Select Battery Power Conservation Checklist Conserving Battery PowerTurning Auto Insert Notification On or Off Conserving Battery Power in Windows Conserving Battery Power in Windows NT Bay Configuration Bay ConfigurationFunctional Bay Devices Supported Power State Working with Removable Drives and Device Bays Caring for Removable Drives Changing the Startup Sequence with MultiBoot Selecting Diskettes Type of Drive Diskettes Accepted DualBay Devices Inserting a DualBay Device Second Battery Pack Removing a DualBay Device MultiBay Devices Inserting a MultiBay Device Using a Second Hard Drive Removing a MultiBay Device Removing a Compact Disc Using the Third Battery Pack Using the LS-120 DriveManually Ejecting a Compact Disc Using AN Internal Modem Connecting the Modem Cable Selecting Communication Software Using Modem Commands and Dial Modifiers Uninstalling the ModemUsing the Modem While Traveling Internationally Using a Country-Specific Modem Adapter Selecting a Country-Specific Modem Configuration Travel Connection Checklist Check the telephone line type-the modem requires an 6Using an Internal Modem Available on Select Models Connecting an External Enhanced Keyboard Connecting an External Monitor Connecting a Television Monitor If you are running Windows 95 or later to ensure that Connecting a Serial Printer Connecting a Mouse or Other External Pointing DeviceConnecting a Parallel Printer Connecting Infrared Equipment Configuring the Infrared Port Enabling the Infrared Port Connecting USB Peripherals Connecting to a Docking Device PC Card Types Using PC CardsInserting a PC Card 2Using PC Cards Removing a PC Card Managing PC Card Power Changing PC Card SettingsPC Card Device Drivers Zoomed Video Stopping a PC Card Using Audio Features Identifying the Audio ComponentsAudio Components Component1 Using Internal and External Microphones Audio Components Component3 Using Internal and External Speakers/Headphones Controlling Audio Volume Speaker Ports Upgrading System Memory Upgrading the ComputerChecking the Amount of Memory Obtaining an Optional Memory Expansion Board Inserting a Memory Expansion Board External cables during this step Removing a Memory Expansion Board Upgrading the Computer Upgrading the Hard Drive Attaching a Hard Drive AdapterAdding an Internal Modem Removing and Inserting the Primary Hard Drive Maintenance and Travel Uidelines Obtaining Customized Update Information With Info MessengerObtaining Software Updates and Enhancements By Subscription Updating the System Displayingn the Version of the Installed System ROM Updating the System ROM Installing a System ROM from a Diskette Obtaining a System ROM Reinstalling Software Caring for the Computer Preparing the Computer for Shipping or Travel Traveling with the Computer If you are traveling internationally Security Features Types of Security Using the Cable Lock Establishing the Power-On Password Using the Power-On PasswordEntering a Power-On Password Changing the Power-On Password Country Key Character Deleting the Power-On Password If You Forget Your Power-On Password Using Quick Controls Enabling Quick Controls Using the Setup Password Establishing the Setup Password Entering the Setup Password Changing the Setup Password Deleting the Setup Password Enabling and Disabling Devices User and Master Passwords Overview DriveLock Overview Establishing DriveLock Protection Changing the User or Master Password Removing DriveLock Protection Intelligent Manageability Intelligent Manageability Overview Asset Management Fault Management Fault Management Alerts Configuration Management Security Management Computer Setup Diagnostics Utilities Selecting Computer Setup or Compaq Diagnostics for Windows Using Computer Setup Begin here Selecting from the File MenuTo do this Selecting from the Security Menu Begin here To do this Selecting from the Advanced Menu Using Compaq Diagnostics for Windows Running a Diagnostic Test Computer Setup and Diagnostics Utilities Troubleshooting Troubleshooting Checklist Solving Audio Problems ProblemSolution Possible Cause Solving Audio Problems Possible Cause Solution 16-4Troubleshooting Solving Battery Problems Solving Battery Problems Possible Cause Solution Solving CD-ROM Drive and DVD-ROM Drive Problems Problem Possible Cause Solution Solving Diskette and SuperDisk LS-120 Drive Problems Problem Possible Cause Solution Solving Hard Drive Problems Solving Hardware Installation Problems Solving Keyboard Problems Solving Memory Problems Solving Modem Problems ATX3DT Solving ModemProblems Possible Cause Solution ATM1 Modem is connected to a digital line. Note Solving Modem Problems Possible Cause Solution Solving Modem Problems 16-18Troubleshooting Solving PC Card Problems Solving PC Card Problems Possible Cause Solving PC Card Problems Solving Power Problems Solving PC Card Problems Possible Cause Solution Solving Printer Problems Solving Screen Problems Solving Screen Problems Possible Cause Solution Solving Software Application Problems Solving Pointing Device Problems Solving Infrared Problems There is an interrupt request IRQ conflict Solving Infrared Problems Possible Cause Solution Solving USB Problems Compaq Customer Support Preparing to Call Technical Support Worldwide Telephone Numbers Worldwide Telephone NumbersCountry Location Code Telephone Number Brazil Colombia Greece Korea Norway Sweden Venezuela Regulatory Notices Regulatory Agency Series Numbers Modifications Federal Communications Commission NoticeCables Avis Canadien Canadian NoticeEuropean Notice Battery Notice Japanese Notice German Ergonomics NoticeAirline Travel Notice Energy Star Compliance Power Cords Cdrh Regulations Laser SafetyLaser Information Safety Precautions for Modems Regulations Governing Use of Modems 8Regulatory Notices Telephone Consumer Protection Act Canadian Regulations Governing Use of Modems New Zealand Modem Statements Regulatory Notices B-11 Macrovision Corporation Notice When Handling Removable Drives When Installing Internal ComponentsElectrostatic Discharge Preventing Electrostatic Discharge Grounding Methods Specifications Electrical Ratings for AC Adapter Index Index 2Index Index 4Index Index 6Index QuickRestore CD-ROMs,12-4 8Index Index