Dell OptiPlex GX520

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Pin Number

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Signal Name

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22-AWG Wire

+5 VCD

Red

COM

Black

COM

Black

+12 VDC

Yellow

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Pin Number

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Signal name

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18-AWG Wire

+12 VDC

Yellow

COM

Black

COM

Black

+5 VDC

Red

Main Page

Advanced Features2
Legacyselect Technology Control2
Alert Standard Format2
Dell Openmanage Client Instrumentation2
Chassis Intrusion Detection3
Option Settings3
Padlock Ring and Security Cable Slot3
Password Protection3
Assigning a System Password4
Typing Your System Password4
Administrator Password5
Deleting or Changing an Existing System Password5
Assigning an Administrator Password5
Operating Your Computer with an Administrator Password Enabled5
Deleting or Changing an Existing Administrator Password5
Disabling a Forgotten Password and Setting a New Password6
Entering System Setup6
System Setup Screens6
System Setup Options7
Boot Sequence9
Booting to a USB Device10
Changing Boot Sequence for the Current Boot10
Changing Boot Sequence for Future Boots10
Memory Key10
Floppy Drive10
Clearing Forgotten Passwords11
Clearing CMOS Settings12
Hyper-Threading12
Power Management13
Replacing the Battery14
Before You Begin16
Recommended Tools16
Turning off Your Computer16
Before Working Inside Your Computer16
Chassis Intrusion Switch20
Mini Tower Computer20
Desktop Computer20
Replacing the Chassis Intrusion Switch21
Resetting the Chassis Intrusion Detector21
Small Form Factor Computer21
Cleaning Your Computer23
Computer, Keyboard, and Monitor23
Floppy Drive23
Cds and Dvds23
Replacing the Computer Cover25
Notes, Notices, and Cautions26
Abbreviations and Acronyms26
Finding Information27
Getting Help30
Technical Assistance30
Online Services30
Problems with Your Order31
Product Information31
Returning Items for Warranty Repair or Credit31
Autotech Service31
Technical Support Service31
Before You Call32
Contacting Dell32
DDR2 Memory Overview53
Addressing Memory with 4-GB Configurations53
Removing Memory54
Replacing/Adding Additional Memory54
About Your Mini Tower Computer59
Front View59
Back View60
Back Panel Connectors60
Inside Your Computer62
System Board Components62
Jumper Settings63
PCI and PCI Express Cards and Serial Port Adapters64
Installing a PCI Card64
Removing a PCI Card66
Installing a PCI Express Card67
Removing a PCI Express Card69
Installing a Serial Port Adapter70
Removing a Serial Port Adapter72
Removing the Computer Cover73
General Installation Guidelines74
Ide Drive Addressing74
Connecting Drive Cables74
Drive Interface Connectors74
Power Cable Connectors75
Connecting and Disconnecting Drive Cables75
Hard Drive75
Removing a Hard Drive76
Installing a Hard Drive76
Adding a Second Hard Drive78
Drive-Panel Inserts79
Removing the Floppy Drive81
Installing the Floppy Drive81
Removing a CD/DVD Drive82
Installing a CD/DVD Drive83
Removing the I/O Panel96
Replacing the I/O Panel96
Removing the Processor98
Installing the Processor99
Replacing the Power Supply101
DC Power Connectors102
Mini Tower Computer Specifications105
Fcc Notices (U.s. Only)109
FCC Identification Information110
Reinstalling Drivers and the Operating System113
What Is a Driver113
Identifying Drivers113
Reinstalling Drivers and Utilities113
Using Windows Xp Device Driver Rollback113
Using the Optional Drivers and Utilities CD114
Using Microsoft Windows Xp System Restore114
Creating a Restore Point114
Restoring the Computer to an Earlier Operating State115
Undoing the Last System Restore115
Reinstalling Microsoft Windows XP115
Enabling System Restore115
Reinstalling Windows XP116
Booting from the Operating System CD116
Windows Xp Setup116
Replacing the System Board118
Removing the System Board118
Mini Tower System Board Screws118
Desktop System Board Screws119
Small Form Factor System Board Screws119
About Your Desktop Computer121
Front View121
Back View122
Back Panel Connectors122
Inside Your Computer123
System Board Components124
Jumper Settings124
Installing a PCI Card126
Removing a PCI Card127
Installing a PCI Card in the Riser-Card Cage128
Removing a PCI Card from the Riser-Card Cage130
Removing the Computer Cover135
General Installation Guidelines136
Connecting Drive Cables136
Drive Interface Connectors136
CD/DVD Drive137
Installing a CD/DVD Drive138
Removing a Floppy Drive139
Installing a Floppy Drive140
Installing a Hard Drive142
Removing the I/O Panel144
Replacing the I/O Panel144
Removing the Processor146
Installing the Processor147
Desktop Computer Specifications154
About Your Small Form Factor Computer158
Small Form Factor Computer Specifications182
Notes, Notices, and Cautions185
Abbreviations and Acronyms185
Solving Problems186
Battery Problems186
CD and DVD Drive Problems186
Problems Writing to a CD/DVD-RW Drive187
Hard Drive Problems187
Keyboard Problems187
Lockups and Software Problems188
The Computer Does Not Start up188
The Computer Stops Responding188
A Program Stops Responding188
A Program Crashes Repeatedly188
A Solid Blue Screen Appears188
Other Software Problems189
Memory Problems189
Mouse Problems189
Network Problems190
Power Problems190
Printer Problems191
Restoring Default Settings192
Serial or Parallel Device Problems192
Sound and Speaker Problems192
No Sound from Speakers192
No Sound from Headphones193
Video and Monitor Problems193
If the Screen Is Blank193
If the Screen Is Difficult to Read194
Troubleshooting Tools and Utilities206
When to Use the Dell Diagnostics206
Starting the Dell Diagnostics from Your Hard Drive206
Dell Diagnostics Main Menu207
System Lights207
Diagnostic Lights208
Beep Codes209
Error Messages210
Resolving Software and Hardware Incompatibilities212
Warranty223
Microsoft® Windows® XP Features224
Transferring Information to a New Computer224
User Accounts and Fast User Switching225
Setting up a Home and Office Network225
Adding User Accounts225
Connecting to a Network Adapter225
Network Setup Wizard225

Dell OptiPlex GX520 - Page 104

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