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CAUTION: To guard against electrical shock, always unplug your computer from the electrical outlet before opening the cover.

NOTICE: Before touching anything inside your computer, ground yourself by touching an unpainted metal surface, such as the metal at the back of the

computer. While you work, periodically touch an unpainted metal surface to dissipate static electricity, which could harm internal components.

Abbreviations and Acronyms1
About Your Computer2
Front View (Tower Orientation)2
Back View (Tower Orientation)3
Back Panel Connectors3
Front View (Desktop Orientation)5
Back View (Desktop Orientation)5
Inside View - Hard Drive Bay Rotated out6
System Board Components7
Advanced Features9
Legacyselect Technology Control9
Alert Standard Format9
Dell Openmanage Client Instrumentation9
Chassis Intrusion Detection10
Option Settings10
Padlock Ring and Security Cable Slot10
Password Protection11
System Password11
Assigning a System Password11
Typing Your System Password12
Deleting or Changing an Existing System Password12
Administrator Password12
Assigning an Administrator Password13
Operating Your Computer with an Administrator Password Enabled13
Deleting or Changing an Existing Administrator Password13
Disabling a Forgotten Password and Setting a New Password14
Entering System Setup14
System Setup Screens14
System Setup Options15
Selecting the Boot Device for the Current Boot19
Changing Boot Sequence for Future Boots19
Boot Menu19
Clearing Forgotten Passwords20
Booting to a USB Device20
Memory Key20
Clearing CMOS Settings21
Power Management22
Hyper-Threading and Dual-Core Technology22
About RAID Configurations22
RAID Level22
Raid Level 123
Raid Level 523
Setting Your Computer to RAID-Enabled Mode24
Configuring Your Computer for RAID Using the Intel Matrix Storage Manager24
Creating a RAID Level 0 Configuration24
Creating a Raid Level 1 Configuration25
Deleting a Raid Volume25
Migrating to a Raid Level 0 Configuration26
Migrating to a RAID Level 1 Configuration27
Migrating to a RAID Level 5 Configuration27
Creating a Spare Hard Drive27
Configuring Your Computer for RAID Using the Intel® RAID Option ROM Utility28
About the Battery31
Replacing the Battery31
Before You Begin33
Recommended Tools33
Turning off Your Computer33
Before Working Inside Your Computer33
Expansion Card Support35
Installing an Expansion Card35
Removing an Expansion Card38
Copying Cds and Dvds41
How to Copy a CD or DVD41
Using Blank Cds and Dvds41
Helpful Tips42
Cleaning Your Computer43
Computer, Keyboard, and Monitor43
Floppy Drive43
Cleaning an Optical Mouse43
Cds and Dvds44
Removing the Processor45
Installing the Processor47
Tower Computer Drives50
Desktop Computer Drives50
General Drive Installation Guidelines52
Power Cable Connectors52
Hard Drive53
Removing the Drive Panel64
Removing a Drive-Panel Insert65
Replacing a Drive-Panel Insert66
Replacing the Drive Panel66
Floppy Drive67
Media Card Reader75
CD/DVD Drive82
FCC Notice (U.S. Only)89
FCC Class B89
Information about Your Computer90
Finding Information90
Specifications92
Caring for Your Computer95
Getting Help96
Technical Assistance96
Online Services96
Problems with Your Order97
Product Information97
Returning Items for Warranty Repair or Credit97
Autotech Service97
Technical Support Service97
Before You Call98
Contacting Dell98
I/O-Panel Components115
Removing the I/O Panel115
Replacing the I/O Panel116
Fully Buffered DIMM (FBD) Memory Overview118
Addressing Memory with 4-GB or Greater Configurations118
Memory Installation118
Removing Memory119
Installing Memory119
Removing the Power Supply122
Replacing the Power Supply122
Removing the Computer Cover and Front Panel124
Rotating the Hard-Drive Carrier out of the Computer125
Removing the Front Panel125
Changing between Tower and Desktop Modes127
Replacing the Front Panel and Computer Cover130
Rotating the Hard-Drive Carrier Back into the Computer130
Replacing the Front Panel131
Replacing the Computer Cover131
Removing the Chassis Intrusion Switch135
Replacing the Chassis Intrusion Switch135
Resetting the Chassis Intrusion Detector135
Removing the System Board137
Replacing the System Board139
Notes, Notices, and Cautions140
Abbreviations and Acronyms140
Diagnostic Light Codes before POST141
Diagnostic Lights141
Diagnostic Light Codes During POST142
Beep Codes143
Error Messages144
When to Use the Dell Diagnostics147
Starting the Dell Diagnostics from Your Hard Drive147
Starting the Dell Diagnostics from the Drivers and Utilities CD148
Dell Diagnostics Main Menu148
What Is a Driver149
Identifying Drivers149
Reinstalling Drivers and Utilities149
Using Windows Xp Device Driver Rollback149
Restoring Your Operating System150
Using the Drivers and Utilities CD150
Manually Reinstalling Drivers150
Using Microsoft Windows Xp System Restore150
Using Dell PC Restore by Symantec151
Creating a Restore Point151
Restoring the Computer to an Earlier Operating State151
Undoing the Last System Restore151
Enabling System Restore151
Removing Dell PC Restore152
Using the Operating System CD153
Reinstalling Windows Xp153
Solving Problems154
Troubleshooting Tips154
Battery Problems154
Card Problems154
Card Fan Problems155
Drive Problems155
E-Mail, Modem, and Internet Problems156
CD and DVD Drive Problems156
Hard Drive Problems156
IEEE 1394 Device Problems157
Keyboard Problems158
Lockups and Software Problems158
The Computer Does Not Start up158
The Computer Stops Responding158
A Program Stops Responding158
A Program Crashes Repeatedly158
Media Card Reader Problems159
A Solid Blue Screen Appears159
Other Software Problems159
Memory Problems160
Mouse Problems160
Network Problems161
Power Problems161
Printer Problems162
Serial or Parallel Device Problems162
Sound and Speaker Problems162
No Sound from Speakers163
No Sound from Headphones163
Video and Monitor Problems163
If the Screen Is Blank164
If the Screen Is Difficult to Read164
Transferring Information to a New Computer165
Running the Files and Settings Transfer Wizard with the Operating System CD165
Running the Files and Settings Transfer Wizard Without the Operating System CD166
Start Menu167
Control Panel167
Choosing a Wallpaper167
Choosing a Screen Saver168
Creating Shortcuts168
Desktop Cleanup Wizard169
Internet Connection Firewall169
Setting up a Home and Office Network169
Connecting to a Network Adapter169
Network Setup Wizard170

Brand	Dell
Model	Precision 490 Desktop
Category	Desktop
Language	English

Dell Precision 490 Desktop User Manual

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Dell Precision 490 Desktop Specifications

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