15-26Troubleshooting, Windows 95, Up to five tiers | Compaq M300

15-26Troubleshooting
	Solving USB Problems	Continued
	External devices in the	Windows 95 and
	sixth tier do not work.	Windows 98 support
		up to five tiers.

External devices in		An unpowered hub
lower tiers do		is connected
not work.		to another
		unpowered hub.

Replace some hubs in the first five tiers with hubs containing additional sockets, then connect the devices in the sixth tier to the new hubs.

Connect some external USB devices to other connectors.

Use only powered hubs.

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

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Compaq M300 manual 15-26Troubleshooting, Windows 95, Up to five tiers, External devices

Contents

Compaq Armada M300 Series of Personal Computers Documentation Survey Business Reply Mail Compaq Armada M300 Series First Edition June Part Number Compaq Computer Corporation Compaq Armada M300 Series Reference Guide Contents Managing Power Upgrading Your Computer Vii Using Audio Features Viii Intelligent Manageability Securing the Computer Appendix a Appendix B Appendix D Xii Text Conventions Xiii Could result in bodily harm or loss of life Symbols in TextXiv About This Guide Damage to equipment or loss of information Getting Started Identifying Packing Box ContentsFinding Information Component Identifying Hardware Components2Getting Started Function To-2-prong plug adapter Japan only Top Components Taking a Look at the ComputerTop Components Component Function 2Taking a Look at the Computer Top7Components Left Side Components Left Side Components 4Taking a Look at the Computer Right Side ComponentsRight Side Components PC Card slot Air intake vents Air exhaust vents Front Components Front ComponentsOpens the computer Rear Components Rear Components Bottom Components Bottom ComponentsProduces sound External Diskette Drive Connecting the Diskette Drive8Taking a Look at the Computer Versatile Battery Pack Disconnecting the Diskette Drive Using the Pointing Device Using the KeyboardIdentifying Keyboard1 Components Procedure TouchPad Procedures2Using the Keyboard Navigating with the TouchPad Setting TouchPad Preferences Using HotkeysScroll Lock+Scroll Lock+F3 Task Switching the Display and ImageAdjusting System Volume Hotkeys Viewing Battery Charge Status Setting a Power Conservation LevelInitiating Quick Controls 6Using the Keyboard Adjusting Screen BrightnessEnabling the Eurocurrency Symbol Displaying System Information Toggling thenKeypad On and Off Using the Embedded Numeric KeypadOperating the Keypad Keys as Standard Keys 8Using the Keyboard Enabling the Keypad at Startup Selecting a Power Source Managing PowerSelecting a Power Source Recommended Power Source Selecting a Power Source 2Managing PowerAdapter Beginning, Leaving, or Resuming Your Work Standby or Hibernation Beginning, Leaving, or Resuming Your Work 4Managing PowerPower/suspend* light turns off Result Beginning, Leaving, or Resuming Your Work Managing Low-Battery ConditionsIdentifying Low-Battery Conditions Initiate Press Fn + suspend button Resolving Low-Battery Conditions 6Managing Power Charging a Battery Pack If you are charging the battery pack in the computer Monitoring the Charge in a Battery Pack 8Managing Power Using the Battery Status Tab Using the Battery Charge Level LightsUsing the Battery Meter or Power Meter Icon Windows 95 and Windows Using the Power or Power Meter Tab10Managing Power Windows NT Calibrating a Battery Pack 12Managing Power Running a Calibration Computer battery bay Changing the Primary Battery PackBattery Pack Location Stopping a Calibration Removing the Primary Battery Pack 14Managing Power Installing the Primary Battery Pack 16Managing Power Storing the Battery Pack 18Managing Power Using Power PreferencesRecommended Battery Pack Storage Temperatures Storage Time Procedure from Control Panel Setting Power Preferences in Windows 95 or Windows NTSetting Power Preferences in Windows 95 or Windows NT Settings tab. Select Custom, then enter Your preferences Set Hibernation timeout 20Managing PowerSetting Power Preferences in Windows 95 or Windows NT Settings tab, then select the On or Off Button Setting Power Preferences in Windows 22Managing Power Conserving Battery PowerBattery Power Conservation Checklist Turning Auto Insert Notification On or Off Conserving Battery Power in Windows Conserving Battery Power in Windows NT 24Managing Power Upgrading Your Computer Managing Random Access Memory RAMMemory Removing or Inserting a Memory Expansion Board 2Upgrading Your ComputerPage 4Upgrading Your Computer Page Removing the Primary Hard Drive Hard Drives6Upgrading Your Computer Inserting the Primary Hard Drive 8Upgrading Your Computer Changing the Startup Sequence with MultiBoot Caring for Drives 10Upgrading Your Computer Bay Docking Devices Connecting the Computer Disconnecting the Computer 2Mobile Expansion Unit on select models Docking and Undocking to a Compatible Docking Device Turning Equipment On and Off Connecting the AC Adapter4Mobile Expansion Unit on select models Connecting External Devices Drive Devices Operating External Devices6Mobile Expansion Unit on select models Drives Support Drives SupportRemoving a MultiBay Device Bay Device Bay Location Inserting a MultiBay Device 8Mobile Expansion Unit on select models Removing the Diskette Drive from Diskette Drive Bay 10Mobile Expansion Unit on select models Inserting the Diskette Drive into the Diskette Drive Bay Connecting the Modem Cable 2Using an Internal Modem available on select models Configuring the ModemRecommended Settings Selecting Communications Software Using Modem Commands and Dial Modifiers Using the ModemSetting Modem Preferences 4Using an Internal Modem available on select models Installing and loading fax communication software Using the Modem While Traveling Internationally Using a Country-Specific Modem Adapter Travel Connection Checklist Selecting a Country-Specific Modem Configuration6Using an Internal Modem available on select models Page Configuring a PC Card Using PC CardsInserting or Removing a PC Card 2Using PC Cards Inserting a PC Card Removing a PC Card 4Using PC Cards Using Audio Features Using the Internal Microphone Stereo Speakers 2Using Audio Features Selecting an Audio Connector Connecting an External Audio DeviceConnecting a Device to the Microphone Jack To Connect This Device Use This Jack Connecting a Device to Stereo Speaker/Headphone Jack 4Using Audio Features Adjusting Volume Using the Fn+F5 hotkeys Communicating with Infrared Using the Infrared Port10-1 10-2Using the Infrared Port Configuring the Infrared PortEnabling the Infrared Port 10-3 Security Features Quick Reference Security Features Quick ReferenceIf You Forget a Password Securing the Computer Setting, Changing, or Deleting a Power-On Password Using a Power-On Password11-2Securing the Computer Setting, Changing, or Deleting Quick Control Preferences Using Quick ControlsEntering a Power-On Password 11-3 Exiting QuickLock Using a Setup PasswordInitiating QuickLock Manually 11-4Securing the Computer Entering a Setup Password 11-5 Using DriveLock 11-6Securing the Computer Protecting a Hard Drive with DriveLock 11-7 Accessing a Protected Hard Drive 11-8Securing the Computer Disabling a Device 11-9 Securing the Computer Hard Drive Bay 11-10Securing the Computer Connecting an Optional Cable Lock 11-11 Finding Intelligent Manageability Help Intelligent Manageability12-1 Setting Fault Management Alert Preferences Using Fault Management AlertsIdentifying a Fault Management Alert 12-2Intelligent Manageability Obtaining Software Updates Enhancements by Subscription Maintenance, Shipping, TravelObtaining Customized Update Information with Info Messenger Updating the System Displaying the Version of the Installed System ROM 13-2Maintenance, Shipping, and Travel Obtaining a System ROM Installing a System ROM from a Diskette13-3 Replacing the Lithium Real-time Clock Battery Reinstalling Software13-4Maintenance, Shipping, and Travel Caring for the Computer 13-5 Preparing the Computer for Shipping or Travel 13-6Maintenance, Shipping, and TravelTraveling with the Computer 13-7 Selecting Computer Setup or Compaq Diagnostics for Windows Configuration and Diagnostic Utilities14-1 Selecting from the File Menu Using Computer Setup14-2Configuration and Diagnostic Utilities Selecting from the File Menu Selecting from the Security Menu Setup password Power-On password DriveLock passwordsSelecting from the Security Menu 14-3 14-4Configuration and Diagnostic Utilities Selecting from the Security Menu Selecting from the Advanced Menu Change the Computer Setup language Boot OptionsSelecting from the Advanced Menu 14-5 14-6Configuration and Diagnostic Utilities Using Compaq Diagnostics for WindowsSelecting from the Advanced Menu Running a Diagnostic Test 14-7 14-8Configuration and Diagnostic Utilities Quick Solutions Checklist Troubleshooting15-1 15-2Troubleshooting Solving Audio ProblemsSolving Audio Problems Problem Possible Cause Solution 15-3 Headphones, or a Turned down Volume Headset produces noVolume needs Multimedia Adjusting Sound Software application 15-4Troubleshooting Solving Battery ProblemsSolving Battery Problems Problem 15-5 Solving Battery ProblemsReplace the battery pack No action is required 15-6Troubleshooting Battery charge does not last as long as expected Solving Hard Drive Problems Solving Drive ProblemsSolving Hard Drive Problems 15-7 Solving CD-ROM Drive and DVD-ROM Drive Problems Solving CD-ROM and DVD-ROM Drive Problems15-8Troubleshooting Enable CD-ROM boot ability Solving CD-ROM Drive and DVD-ROM Drive Problems15-9 Solving Diskette and SuperDisk LS-120 Drive Problems Solving Diskette and SuperDisk LS-120 Drive Problems15-10Troubleshooting Solving Diskette and SuperDisk LS-120 Drive Problems Solving Infrared ProblemsSolving Infrared Problems 15-11 15-12Troubleshooting Solving Infrared Problems Movement Orientation 15-13Do not move either unit during data transmission Solving Keyboard and Pointing Device Problems Solving Keyboard and Pointing Device Problems15-14Troubleshooting Solving Memory Problems Solving Memory ProblemsSolving Modem Problems Solving Modem Problems At the command line in terminal mode, type ATX3DT 15-16TroubleshootingSolving Modem Problems Refer to Disabling a Device in Chapter Modem is not Responding to Commands from Computer keyboard 15-17 Modem does not connect Not connect at highest speed 15-18TroubleshootingTelephone 15-19 Characters are garbled/transfer rates are slow Modem loses 15-20TroubleshootingRestore power, if necessary Connection Interfering with 15-21 Solving PC Card ProblemsSolving PC Card Problems Windows 95 or Windows 98 refer 15-22Troubleshooting Solving Power ProblemsSolving Power Problems Battery pack may be defective Solving Power Problems 15-23 Solving Screen Problems Solving Screen Problems15-24Troubleshooting Solving USB Problems Solving USB Problems15-25 Up to five tiers 15-26TroubleshootingWindows 95 External devices Compaq Customer Support Using the Worldwide WebPreparing to Call Technical Support 2Compaq Customer Support Country Location Code Telephone Number Argentina Worldwide Telephone NumbersWorldwide Telephone Numbers Australia 4Compaq Customer Support Worldwide Telephone Numbers Denmark ColombiaCzech Republic Eastern Europe, The Middle East Africa 6Compaq Customer Support Japan IsraelItaly Korea 8Compaq Customer Support Singapore PortugalRussia South Africa 10Compaq Customer Support Product Regulatory NoticesRegulatory Agency Series Numbers Agency Series Number Modifications 2Regulatory Notices Cables Canadian NoticeUnited States only Japanese Notice Airline Travel Notice Power CordsAvis Canadien Energy Star Compliance Battery Notice Laser Information Laser SafetyCdrh Regulations 6Regulatory Notices Laser Information European Union NoticePolarization Circular Safety Precautions for Modems 8Regulatory Notices Regulations Governing Use of Modems Canadian Regulations Governing Use of Modems Telephone Consumer Protection Act10Regulatory Notices Page New Zealand Modem Statements 12Regulatory Notices Macrovision Corporation Notice Electrostatic Discharge When Handling DrivesWhen Installing Internal Components Preventing Electrostatic Discharge Grounding Methods 2Electrostatic Discharge Computer Dimensions SpecificationsComputer Dimensions Operating Environment Rated Input Power Rated Input PowerPort and COM Port Settings Port and COM Port Settings Modem Specifications Modem SpecificationsPort and COM Port Settings Index Index-1 Index-2 Index-3 Index-4 Index-5 Index-6 Index-7 Index-8 Index-9 Reference, Armada Quick, online Index-10 Index-11 Index-12 Index-13