Dell U7021, WHL manual Power Management, Overview, Standby Mode, Hibernate Mode

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Power Management

Overview

The Microsoft® Windows® XP power management features can reduce the amount of electricity your computer uses when it is on and you are not using it. You can reduce power to just the monitor or the hard drive, or you can use standby mode or hibernate mode to reduce power to the entire computer. When the computer exits from a power conservation mode, the Windows desktop is restored to the state it was in before it entered the mode.

NOTE: Windows XP Professional includes security and networking features not available in Windows XP Home Edition. When a Windows XP Professional computer is connected to a network, different options related to security and networking appear in certain windows.

Standby Mode

Standby mode conserves power by turning off the display and the hard drive after a time-out. When the computer exits from standby mode, it returns to the operating state it was in before it entered standby mode.

To set standby mode to automatically activate after a defined period of inactivity:

1Click the Start button and click Control Panel.

2Under Pick a category, click Performance and Maintenance.

3Under or pick a Control Panel icon, click Power Options.

To immediately activate standby mode without a period of inactivity, click the Start button, click Turn Off Computer, and then click Stand by.

To exit from standby mode, press a key on the keyboard or move the mouse.

NOTICE: If your computer loses power while in standby mode, it may lose data.

Hibernate Mode

Hibernate mode conserves power by copying system data to a reserved area on the hard drive and then completely turning off the computer. When the computer exits from hibernate mode, the desktop is restored to the state it was in before it entered hibernate mode.

To activate hibernate mode:

1Click the Start button and click Control Panel.

2Under Pick a category, click Performance and Maintenance.

3Under or pick a Control Panel icon, click Power Options.

4Define your hibernate settings on the Power Schemes tab, Advanced tab, and Hibernate tab.

Setting Up and Using Your Computer

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Contents W . d e l l . c o m s u p p o r t . d e l l . c o m March U7021 Contents Optimizing Performance Restoring the Computer to an Earlier Operating State Using Microsoft Windows XP System RestoreResolving Software and Hardware Incompatibilities 102 Removing and Installing Parts110 106108 109131 130Finding Information Dell Product Information Guide Setup Diagram Click the topic that describes your problem Warranty, and repair informationSpecifications, and white papers How to use Windows XPFinding Information Opening the Drive Door Setting Up and Using Your ComputerBadge Changing the Front-Panel Light ColorConnecting Two Monitors With VGA Connectors Connecting Two MonitorsTV-OUT connector VGA blue connector Connecting a TVOptional DVI adapter Changing the Display Settings About Your RAID ConfigurationAbout Serial ATA Drives Segment RAID LevelHard drive Setting Your Computer to RAID-Enabled Mode Configuring Your Computer for RAIDCreating a RAID Level 0 Configuration Configuring for RAID Using the IntelR Option ROM UtilityCreating a RAID Level 1 Configuration Deleting a RAID Volume Creating a RAID 1 Volume Creating a RAID 0 VolumeMigrating to a RAID 0 Volume On the Delete RAID Volume Wizard screen, click NextTo Mark a Drive as a Spare Hard Drive Migrating to a RAID 1 VolumeClick Reset Hard Drive to Non-RAID Creating a Spare Hard DriveTransferring Information to a New Computer Rebuilding a Degraded RAID 1 VolumePlaying a CD or DVD Playing CDs and MoviesNext DVD player includes the following basic buttons Go to the previous title or chapter Eject Adjusting the VolumeAdjusting the Picture Copying CDs and DVDsUsing Blank CD-Rs, CD-RWs, DVD+Rs, and DVD+RWs How to Copy a CD or DVDClick Exact Copy Click Checklist for creating a network Network Setup WizardHelpful Tips Overview Power ManagementStandby Mode Hibernate ModePower Schemes Tab Power Options PropertiesHibernate Tab Advanced TabSetting Up and Using Your Computer Optimizing Performance Hyper-ThreadingOverclocking Click Hardware and click Device ManagerPCI Express Cards Solving Problems Troubleshooting TipsBattery Problems Drive ProblemsProblems writing to a CD/DVD-RW drive CD and DVD drive problemsHard drive problems Mail, Modem, and Internet ProblemsUse these characters in filenames Error MessagesKeyboard Problems Ieee 1394 Device ProblemsProgram stops responding Lockups and Software ProblemsComputer does not start up Computer stops respondingSolid blue screen appears Other software problemsProgram crashes repeatedly Program is designed for an earlier Windows operating systemMouse Problems Memory ProblemsNetwork Problems Power Problems Scanner Problems Printer ProblemsNo sound from speakers Sound and Speaker ProblemsN T H E S P E a K E R D I a G N O S T I C S No sound from headphonesIf the screen is blank Video and Monitor ProblemsIf the screen is difficult to read J U S T T H E W I N D O W S D I S P L a Y S E T T I N G S Solving Problems Has occurred Button Diagnostic LightsElectrical outlet and press the power Advanced TroubleshootingIf the problem persists, contact Dell Normally, reinstall an additionalIdentified a faulty module or If available, install properly workingOccurred Error exists Requirements exist seeYour computer see Determine if a conflict exists byDrive see Dell DiagnosticsWhen to Use the Dell Diagnostics Hard drive, CD drive, and DVDStarting the Dell Diagnostics From the ResourceCD Starting the Dell Diagnostics From Your Hard DriveDell Diagnostics Main Menu Drivers What Is a Driver?Identifying Drivers Windows XP Reinstalling DriversUsing Windows XP Device Driver Rollback Using the ResourceCDManually Reinstalling Drivers Using Microsoft Windows XP System RestoreUndoing the Last System Restore Creating a Restore PointRestoring the Computer to an Earlier Operating State Enabling System Restore Using Dell PC Restore by SymantecResolving Software and Hardware Incompatibilities Reinstalling Microsoft Windows XPBefore You Begin Booting From the Operating System CD Reinstalling Windows XPWindows XP Setup When the Welcome to Microsoft screen appears, click Next Turning Off Your Computer Removing and Installing PartsBefore You Begin Recommended ToolsBefore Working Inside Your Computer Press to turn on the computer Open the door to use the front-panel connectorsFront and Back View of the Computer Front ViewFront View Doors Open Back View One x16 slot and one x1 slot Opening the Computer Cover Floppy drive CD/DVD drive Processor fan Power supply fansSystem board Power supply Removing and Installing Parts Inside View of Your ComputerSystem Board Components DDR2 Memory Overview MemoryAddressing Memory With 4-GB Configurations Installing MemoryNotch Memory module Cutouts Crossbar Securing clips ConnectorRemoving Memory CardsPCI Cards Installing a PCI CardNot fully seated card Fully seated card Retention arm Alignment guide Alignment bar Filler bracket Removing a PCI CardCard slot PCI Express CardsPCI Express Card PCI ExpressTab Installing a PCI Express CardNot fully seated card Fully seated card Retention arm Alignment guide Alignment bar Filler bracket Removing a PCI Express Card Drives General Installation GuidelinesFloppy drive CD/DVD drives Hard drives Drive Interface Connectors Connecting Drive CablesSerial ATA Connector Interface cable Interface connector Removing a Hard Drive Power Cable ConnectorPower cable Hard DriveDrive Bracket rails Screws Removing and Installing Parts Installing a Hard DriveHard-drive cable Power cable Tabs Removing and Installing Parts Adding a Second Hard Drive Rail tabs Floppy DriveFirst hard drive in lower bay Hard drive bay Data cable power cable Tabs Floppy drive Installing a Floppy DriveRemoving a Floppy Drive Drive Bracket rails Screws Removing a CD/DVD Drive CD/DVD DrivePower cable Tabs Data cable CD/DVD drive Installing a CD/DVD Drive100 101 Shroud release lever Anchor tabs Processor Airflow ShroudRemoving the Processor Airflow Shroud 102103 Installing the Processor Airflow ShroudProcessor Removing the ProcessorAnchor tabs Shroud release lever 104105 106 Installing the ProcessorProcessor cover Socket Release lever 107 Removing the Front Panel Front Panel108 109 Replacing the Front PanelRemoving the Drive Door Drive Door110 111 Replacing the Drive DoorTop bracket hinge Bottom bracket hinge Hinge tab Door hinges Door bracket 112Door 113 BatteryReplacing the Battery Battery Battery socket Tab Removing and Installing Parts114 Closing the Computer Cover115 SpecificationsExpansion Bus 116Drives Controls and Lights Connectors117 Center/Low Frequency Effects LFE channel two front-panel118 PowerLocated in the Product Information 10 to 35C 50 to 95F System Setup119 EnvironmentalSystem Setup Screens Entering System Setup120 121 System Setup Options122 123 124 Boot SequenceOption Settings Changing Boot Sequence for the Current Boot125 Changing Boot Sequence for Future Boots126 Clearing Forgotten PasswordsCleaning Your Computer Clearing Cmos SettingsComputer, Keyboard, and Monitor 128 MouseFloppy Drive CDs and DVDsDefinition of Third-Party Software and Peripherals Definition of Dell-Installed Software and PeripheralsDell Technical Support Policy U.S. Only FCC Notices U.S. Only130 Class a Class BFCC Identification Information Contacting Dell131 132 133 134 135 136 137 Fax/Sales Fax 138Ireland Sales Sales dial within U.K. only139 140 141 142 143 Switchboard SalesCountries Sales Penang, Malaysia Appendix 144 145 PowerConnect, and PowerVault Transaction SalesTrinidad/Tobago General Support Turks and Caicos Islands 146 147 Appendix Index 149Index 151 Reinstalling Windows XPIndex 153 Wizard, 43 reinstalling, 11, 64 scanner, 48 System Restore154

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