Dell OptiPlex GX520 User Manual Page 192
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Restoring Default Settings
Serial or Parallel Device Problems
Fill out the Diagnostics Checklist as you complete these checks.
Sound and Speaker Problems
Fill out the Diagnostics Checklist as you complete these checks.
No sound from speakers
To restore the computer's system settings to their default values —
1. Turn on or restart your computer.
2. When Press <F2> to Enter Setup appears in the upper-right corner of the screen, press <F2> immediately.
If you wait too long and the Microsoft®Windows®logo appears, continue to wait until you see the Windows desktop. Then shut
down your computer through the Start menu and try again.
3. Under System Management, select the Maintenance option and follow the directions on the screen.
CAUTION: Before you begin any of the procedures in this section, follow the safety instructions located in the Product Information Guide.
NOTE: If you are having a problem with a printer, see "Printer Problems."
Checktheoptionsetting— See the device's documentation for the recommended settings. Then enter system setup and ensure that the
Serial Port #1 setting (or the Serial Port #2 settings if you have an optional serial port adapter installed) or the LPT Port Mode setting
matches the recommended settings.
Run the Dell Diagnostics
CAUTION: Before you begin any of the procedures in this section, follow the safety instructions located in the Product Information Guide.
NOTE: The volume control in some MP3 players overrides the Windows volume setting. If you have been listening to MP3 songs, ensure that you did not
turn the player volume down or off.
Checkthespeakercableconnections— Ensure that the speakers are connected as shown on the setup diagram supplied with the
speakers. If you purchased an audio card, ensure that the speakers are connected to the card.
Ensurethatthesubwooferandthespeakersareturnedon— See the setup diagram supplied with the speakers. If your speakers have
volume controls, adjust the volume, bass, or treble to eliminate distortion.
AdjusttheWindowsvolumecontrol— Click or double-click the speaker icon in the lower-right corner of your screen. Ensure that the
volume is turned up and that the sound is not muted.
Disconnectheadphonesfromtheheadphoneconnector— Sound from the speakers is automatically disabled when headphones are
connected to the computer's front-panel headphone connector.
Testtheelectricaloutlet— Ensure that the electrical outlet is working by testing it with another device, such as a lamp.
- Mini Tower Computer 1
- Desktop Computer 1
- Small Form Factor Computer 1
- Advanced Features 2
- Security 3
- Password Protection 3
- System Password 4
- Administrator Password 5
- System Setup 6
- System Setup Options 7
- Boot Sequence 9
- Booting to a USB Device 10
- Clearing CMOS Settings 12
- Hyper-Threading 12
- Power Management 13
- Battery 14
- Before You Begin 16
- Chassis Intrusion Switch 20
- Cleaning Your Computer 23
- Desktop Computer 26
- Finding Information 27
- Operating System CD 28
- Getting Help 30
- Problems With Your Order 31
- Product Information 31
- Before You Call 32
- Contacting Dell 32
- Glossary 41
- Memory 53
- Removing Memory 54
- Mini Tower Computer 59
- PCI Express Cards 67
- Removing a PCI Express Card 69
- Removing a Hard Drive 76
- Adding a Second Hard Drive 78
- Drive-Panel Inserts 79
- Power Supply 101
- DC Power Connectors 102
- DC Power Connector P2 103
- DC Power Connector P4 103
- DC Power Connector P7 103
- FCC Notices (U.S. Only) 109
- Drivers 113
- Creating a Restore Point 114
- Before You Begin 115
- Reinstalling Windows XP 116
- Removing the System Board 118
- Desktop System Board Screws 119
- Replacing the System Board 120
- Desktop Computer 121
- Back View 122
- Back-Panel Connectors 122
- Inside Your Computer 123
- System Board Components 124
- Jumper Settings 124
- PCI Cards 126
- Removing a PCI Card 127
- Serial Port Adapters 132
- Drives 136
- CD/DVD Drive 137
- Installing a CD/DVD Drive 138
- Floppy Drive 139
- Installing a Floppy Drive 140
- Hard Drive 141
- Installing a Hard Drive 142
- I/O Panel 144
- Processor 146
- Installing the Processor 147
- DC Power Connector P3 152
- DC Power Connector P5 and P6 152
- Back to Contents Page 157
- Front View 158
- PCI Cards 163
- Abbreviations and Acronyms 185
- Small Form Factor Computer 185
- Solving Problems 186
- Keyboard Problems 187
- A program stops responding 188
- A program crashes repeatedly 188
- A solid blue screen appears 188
- Memory Problems 189
- Mouse Problems 189
- Network Problems 190
- Power Problems 190
- Printer Problems 191
- Restoring Default Settings 192
- Sound and Speaker Problems 192
- Video and Monitor Problems 193
- Mini Tower Computer 204
- Dell Diagnostics 206
- System Lights 207
- Diagnostic Lights 208
- Beep Codes 209
- Error Messages 210
- Microsoft 212
- Windows 212
- Warranty 223
- Adding User Accounts 225
- Fast User Switching 225
- Network Setup Wizard 225
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