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Dell™ OptiPlex™ 755
User’s Guide
Models: DCTR, DCNE, DCSM, and DCCY
www.dell.com | support.dell.com
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Notes, Notices, and Cautions NOTE: A NOTE indicates important information that helps you make better use of your computer. NOTICE: A NOTICE indicates either potential damage to hardware or loss of data and tells you how to avoid the problem. CAUTION: A CAUTION indicates a potential for property damage, personal injury, or death. ® ® If you purchased a Dell™ n Series computer, any references in this document to Microsoft Windows operating systems are not applicable. ____________________ Info
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Contents 1 Finding Information 2 Before You Begin Recommended Tools. . . . . . . . . . . . . . . . . . . . . . . . . . . . 21 Turning Off Your Computer. . . . . . . . . . . . . . . . . . . . . . . 21 Before Working Inside Your Computer . . . . . . . . . . . . . . . . . . . 21 3 Mini Tower Computer About Your Mini Tower Computer. . . . . . . . . . . . . . . . . . . . . . 23 Front View . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23 Back View . . . . . . . . . . . . . . . . . . . .
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Drives. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 53 General Drive Installation Guidelines. . . . . . . . . . . . . . . . . . 53 Connecting Drive Cables. . . . . . . . . . . . . . . . . . . 54 Data Interface Connectors. . . . . . . . . . . . . . . . . . 54 Power Cable Connectors . . . . . . . . . . . . . . . . . . 54 Connecting and Disconnecting Drive Cables . . . . . . . . . 55 Hard Drive . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 55 Removing a Hard Dr
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5 Desktop Computer About Your Desktop Computer . . . . . . . . . . . . . . . . . . . . . . . 87 Front View . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 87 Back View . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 88 Back Panel Connectors . . . . . . . . . . . . . . . . . . . . . . . . 89 Removing the Computer Cover . . . . . . . . . . . . . . . . . . . . . . . 90 Inside Your Computer . . . . . . . . . . . . . . . . . . . . . . . . . . . 91 Chassis Intrusion Switch. . .
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Drives. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 127 General Drive Installation Guidelines. . . . . . . . . . . . . . . . . 127 Connecting Drive Cables. . . . . . . . . . . . . . . . . . 128 Data Interface Connectors. . . . . . . . . . . . . . . . . 128 Power Cable Connectors . . . . . . . . . . . . . . . . . 128 Connecting and Disconnecting Drive Cables . . . . . . . . 129 Drive Inserts . . . . . . . . . . . . . . . . . . . . . . . . . . . . 129 Removing Drive In
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Speakers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 163 Installing a Speaker . . . . . . . . . . . . . . . . . . . . . . . . . 163 Removing a Speaker . . . . . . . . . . . . . . . . . . . . . . . . 163 7 Small Form Factor Computer About Your Small Form Factor Computer . . . . . . . . . . . . . . . . . 165 Front View . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 165 Back View . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 166 Back Panel Connectors
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Power Cable Connectors . . . . . . . . . . . . . . . . . 196 Connecting and Disconnecting Drive Cables . . . . . . . . 196 Hard Drive . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 197 Removing a Hard Drive . . . . . . . . . . . . . . . . . . 197 Installing a Hard Drive. . . . . . . . . . . . . . . . . . . 199 Replacing a Hard Drive Fan . . . . . . . . . . . . . . . . . . . . . 202 Optical Drive . . . . . . . . . . . . . . . . . . . . . . . . . . . . 204 Removing an Optical Dri
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8 Ultra Small Form Factor Computer About Your Ultra Small Form Factor Computer. . . . . . . . . . . . . . . 227 Front View . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 227 Side View. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 228 Back View . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 229 Back Panel Connectors . . . . . . . . . . . . . . . . . . . . . . . 229 Connecting a VGA Monitor. . . . . . . . . . . . . . . . . 230 Connecting Two Monitors . . .
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Module Bay . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 255 Installing a Device When Your Computer Is Turned Off . . . . . . . . 255 Removing and Installing a Device When Your Computer Is Running ® ® Microsoft Windows . . . . . . . . . . . . . . . . . . . . . . . 258 Securing a Device in the Module Bay . . . . . . . . . . . . . . . . 259 Processor . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 261 Speakers . . . . . . . . . . . . . . . . . . . . . . . . .
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Password Protection. . . . . . . . . . . . . . . . . . . . . . . . . . . 277 System Password . . . . . . . . . . . . . . . . . . . . . . . . . . 277 Option Settings . . . . . . . . . . . . . . . . . . . . . . 277 Assigning a System Password . . . . . . . . . . . . . . . 277 Typing Your System Password . . . . . . . . . . . . . . . 278 Deleting or Changing an Existing System Password . . . . . 278 Administrator Password. . . . . . . . . . . . . . . . . . . . . . . 279 Option Settings . . .
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Advanced Tab. . . . . . . . . . . . . . . . . . . . . . . 294 Hibernate Tab. . . . . . . . . . . . . . . . . . . . . . . 294 Options in Windows Vista . . . . . . . . . . . . . . . . . . . . . . 294 Sleep Mode. . . . . . . . . . . . . . . . . . . . . . . . 295 Hibernate Mode. . . . . . . . . . . . . . . . . . . . . . 295 Configuring Power Management Settings . . . . . . . . . 295 About RAID Configurations. . . . . . . . . . . . . . . . . . . . . . . . 295 Verifying That RAID Is Working . .
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12 Memory DDR2 Memory Overview. . . . . . . . . . . . . . . . . . . . . . . 313 Addressing Memory Configurations . . . . . . . . . . . . . . . . . 314 Installing Memory. . . . . . . . . . . . . . . . . . . . . . . . . . 314 Removing Memory . . . . . . . . . . . . . . . . . . . . . . . . . 316 13 Replacing the Computer Cover Mini-Tower, Desktop, and Small Form Factor Computers . . . . . . . . . 317 Ultra Small Form Factor Computers. . . . . . . . . . . . . . . . . . . . 317 14 Installing Yo
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Network Setup . . . . . . . . . . . . . . . . . . . . . . . . . . . 328 Windows XP . . . . . . . . . . . . . . . . . . . . . . . 328 Windows Vista . . . . . . . . . . . . . . . . . . . . . . 329 17 Troubleshooting Battery Problems . . . . . . . . . . . . . . . . . . . . . . . . . . 331 Card Problems . . . . . . . . . . . . . . . . . . . . . . . . . . . 331 Drive Problems . . . . . . . . . . . . . . . . . . . . . . . . . . . 332 Optical drive problems. . . . . . . . . . . . . . . . . . . 3
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Power Lights . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 344 System Lights . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 345 Diagnostic Lights . . . . . . . . . . . . . . . . . . . . . . . . . . . . 347 Beep Codes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 350 System Messages . . . . . . . . . . . . . . . . . . . . . . . . . . . . 351 Dell Diagnostics. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 353 When to Use the Dell Diagnosti
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18 Getting Help Obtaining Assistance . . . . . . . . . . . . . . . . . . . . . . . . . . 365 Online Services . . . . . . . . . . . . . . . . . . . . . . . . . . . 365 AutoTech Service . . . . . . . . . . . . . . . . . . . . . . . . . . 366 Automated Order-Status Service. . . . . . . . . . . . . . . . . . . 366 Support Service. . . . . . . . . . . . . . . . . . . . . . . . . . . 366 Problems With Your Order . . . . . . . . . . . . . . . . . . . . . . . . 367 Product Information . . . . . .
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Finding Information NOTE: Some features or media may be optional and may not ship with your computer. Some features or media may not be available in certain countries. NOTE: Additional information may ship with your computer. What Are You Looking For? Find It Here � A diagnostic program for my computer Drivers and Utilities CD or DVD � Drivers for my computer NOTE: The Drivers and Utilities media may be optional and may not ship with your computer. � My computer documentation � My device doc
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What Are You Looking For? Find It Here � Warranty information Dell™ Product Information Guide � Terms and Conditions (U.S. only) � Safety instructions � Regulatory information � Ergonomics information � End User License Agreement � How to remove and replace parts Dell™ OptiPlex™ User’s Guide � Specifications Microsoft Windows Help and Support Center � How to configure system settings 1 Click Start or → Help and Support→ Dell User � How to troubleshoot and solve problems and System Guides→ Syst
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What Are You Looking For? Find It Here � Solutions — Troubleshooting hints and tips, articles Dell Support Website — support.dell.com from technicians, and online courses, frequently asked NOTE: Select your region or business segment to view the questions appropriate support site. � Community — Online disc ussion with other Dell customers � Upgrades — Upgrade informa tion for components, such as memory, the hard drive, and the operating system � Customer Care — Contact i nformation, service
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What Are You Looking For? Find It Here � How to reinstall my operating system Operating System Media NOTE: The Operating System media may be optional and may not ship with your computer. The operating system is already installed on your computer. To reinstall your operating system, use the Operating System media. See "Reinstalling Windows XP or Windows Vista" on page 363. After you reinstall your operating system, use the Drivers and Utilities media to reinstall drivers for the devices
