Inside Your Computer | Dell 755 instruction

4Grip the sides of the computer cover and pivot the cover up using the hinge tabs as leverage points.

5Remove the cover from the hinge tabs and set it aside on a soft nonabrasive surface.

CAUTION: Graphics card heat sinks can become very hot during normal operation. Ensure that a graphics card heat sink has had sufficient time to cool before you touch it.

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1security cable slot

2cover release latch

3padlock ring

Inside Your Computer

CAUTION: Before you begin any of the procedures in this section, follow the safety instructions in the Product Information Guide.

CAUTION: To avoid electrical shock, always unplug your computer from the electrical outlet before removing the computer cover.

Desktop Computer

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Dell 755 manual Inside Your Computer

Contents

W . d e l l . c o m s u p p o r t . d e l l . c o m Dell OptiPlex User’s Guide September JN460 Contents Connecting and Disconnecting Drive Cables General Drive Installation GuidelinesDC Power Connectors P3, P5, P8, and P9 Desktop Computer 127 General Drive Installation Guidelines 127Connecting and Disconnecting Drive Cables 129 DC Power Connector P5 and P6 160 Contents 166 Small Form Factor Computer Specifications 175163 About Your Small Form Factor Computer 165 202 Connecting and Disconnecting Drive Cables 196197 199 228 Ultra Small Form Factor Computer Specifications 241Connecting and Disconnecting Drive Cables 248 About Your Ultra Small Form Factor Computer 227 258 Installing a Device When Your Computer Is Turned Off 255About Smart Cards and Fingerprint Readers 276 Contents 255 278 Deleting or Changing an Existing System Password 278Deleting or Changing an Existing Administrator Password 280 277 296 Configuring Power Management Settings 295294 295 Mini-Tower, Desktop, and Small Form Factor Computers 317 Addressing Memory Configurations 314313 316 329 Problems writing to an optical drive 333Mail, Modem, and Internet Problems 334 Troubleshooting Power Problems 339 Windows Vista Dell Factory Image Restore 362 Using Microsoft Windows System Restore 359Undoing the Last System Restore 360 Using Dell PC Restore and Dell Factory Image Restore 361 367 Returning Items for Warranty Repair or Credit 367365 366 Support.dell.com How to set up my computerFinding Information Desktop System Software DSS Dell Product Information Guide What Are You Looking For? Find It Here Warranty information For your configuration How to use Windows XP Order status, warranty, and repair informationUpdates Segment, and enter your Service Tag System you ordered Not ship with your computer Turning Off Your Computer Before You BeginRecommended Tools Before Working Inside Your Computer Before You Begin Mini Tower Computer Mini Tower ComputerAbout Your Mini Tower Computer Front View No light The computer is turned off Blinking green The computer is in a power-saving modePower problem may exist see Power Problems on 21 for more information Back View Address. For more information, see System Setup Options on Back Panel ConnectorsGreen a good connection exists between a 10-Mbps network Cap Removing the Computer CoverThat came with your computer Security cable slot Cover release latch Padlock ring Inside Your Computer Chassis Intrusion Switch Replacing the Chassis Intrusion Switch Removing the Chassis Intrusion Switch Resetting the Chassis Intrusion Detector System Board Components SATA3 Mini Tower Computer Mini Tower Computer Specifications Maximum PCI Express Connectors ConnectorsConnector size Connector data width Two Sata optical drives DrivesTwo Sata Serial ATA hard drives One3.5-inch floppy drive or media reader Rating Voltage AC power source WattageControls and Lights Heat dissipation Depth WeightPhysical Height Width Mini Tower Specifications Cards Installing a PCI or PCI Express CardCards Cards Cards Cards Removing a PCI or PCI Express Card Card retention latch Alignment guide Card-edge connector Card connector Card retention latch PS/2 Serial Port Adapter Card fully seated Card not fully seated Bracket within slot Cards Card retention latch Alignment guide Installing eSATA Cards Drives General Drive Installation Guidelines Sata Connector Power Cable Connectors Hard Drive Data cable Hard drive system board Power cable Connector Hard drive Release tabs Snap the bracket onto the new drive Drives Drives Hard drive Hard drive bracket Pins Drives Floppy Drive Floppy drive Drive release latch Floppy drive Shoulder screws Shoulder screw slots Media Card Reader Media card reader Drive release latch Media card Shoulder screws Shoulder screw slots Reader Optical Drive Optical drive Drive release latch Optical drive Shoulder screws Shoulder screw slots Power cable Data cable Sata optical drive connector Removing the Processor ProcessorProcessor Installing the Processor Processor Processor Removing the I/O Panel PanelPanel Replacing the I/O Panel Replacing the Power Supply Power SupplyPower Supply Release button Power supply Screws AC power connector DC Power Connector P1 DC Power Connectors Pin Number Signal name AWG Wire DC Power Connectors P3, P5, P8, and P9 DC Power Connector P2Pin Number Signal Name DC Power Connector P10 DC Power Connector P7 Speakers Installing a SpeakerSpeakers Removing a Speaker Desktop Computer Desktop ComputerAbout Your Desktop Computer Your Computer on page 21 for more information Power Management for Windows XP and Windows Vista on Blinking or solid amber See Power Problems on Position Removing the Computer Cover Inside Your Computer Chassis Intrusion Switch Replacing the Chassis Intrusion Switch Removing the Heat Sink Assembly System Board Components Desktop Computer Desktop Computer Specifications Desktop Computer Specifications Card or a DVI graphics card for dual-monitor support PCI without riser-card cage ConnectorsMaximum PCI Express without riser-card Cage Connectors Board Maximum ESATA Desktop Computer Specifications Expansion Bus Connector sizeMaximum Port adapter 100One3.5-inch floppy drive or media card reader One Sata optical drive 101 Power source Wattage 102 Power Heat dissipationRating 103 PCI CardsExpansion Cards Expansion Cards 105 Expansion Cards 107 Expansion Cards 109 Expansion Cards 111 112 113 Press in on the tab to raise the card-retention latch 114 115 PS/2 Serial Port Adapter 117 Expansion Cards 119 Riser-card cage Handle Riser cards 121 Expansion Cards 123 ESATA Expansion Cards 125 Replace the riser 127 128 129 Drive Inserts 130 131 Drive release latch Optical drive 133 134 135 Drive insert Information Guide Drives 137 Drive release latch Media card reader 139 Drive insert 141 Hard Drive 143 Hard drive Release tabs Plastic hard drive bracket 145 Drives 147 Data cable Hard drive system board Connector 149 Installing the Processor 151 Processor 153 Replacing the I/O Panel 155 Release button Power supply Screws AC power connector 157 158 Pin Signal name 18-AWG Number Wire 159 160 DC Power Connector P3DC Power Connector P4 DC Power Connector P5 and P6 161 162 163 164 Small Form Factor Computer Small Form Factor ComputerAbout Your Small Form Factor Computer 165 166 167 Removing the Computer Cover 169 170 171 172 173 174 Small Form Factor Computer Specifications Small Form Factor Computer Specifications175 Maximum PCI Express Connector Connector176 Port adapter Video 177 178 179 180 181 Expansion Cards 183 184 185 PCI Express and DVI Cards 186 187 Expansion Cards 189 Expansion Cards 191 PS2/SERIAL2 193 Expansion Cards 195 General Installation Guidelines Serial ATA Sata Connector 197 Securing tabs Hard drive 199 Release tabs Hard drive Hard drive bracket 201 Replacing a Hard Drive Fan 203 Optical Drive 205 Floppy Drive 207 Installing a Floppy Drive 209 Media card reader data cable 211 Replacing a Media Card Reader Drives 213 Installing the Processor 215 Processor 217 Replacing the I/O Panel 219 Mounting screw 221 Pin Signal Name Number 222 Pin Signal 18-AWG Number Name Wire DC Power Connectors P3223 DC Power Connector P6 DC Power Connector P5224 225 226 3 4 Ultra Small Form Factor ComputerAbout Your Ultra Small Form Factor Computer 227 Management for Windows XP and Windows Vista on Blinking or solid yellow See Power Problems onSide View 228 229 Network controller is turned off in system setup 231 Connecting Two Monitors 232 233 Removing the Chassis Intrusion Switch 235 236 237 Cable Cover Optional Information Guide Connecting the AC Power Adapter 239 Dell Badge 240 241 Ultra Small Form Factor Computer Specifications 242 Ultra Small Form Factor Computer Specifications 243 244 AC power sourcePhysical 245 246 247 Your computer supports One Sata serial ATA hard drive 248 249 Drives 251 Drives 253 Drives Module Bay Installing a Device When Your Computer Is Turned OffModule Bay 255 Bottom of computer Security screw 257 Latch release 259 Securing a Device in the Module Bay 260 261 Top of heat sink Heat sink Retention base Release tab 263 Processor 265 266 267 Removing a Speaker Manageability Advanced FeaturesAdvanced Features LegacySelect Technology Control Advanced Functionality Error Message DescriptionActive Management Technology 270 271 Dell OpenManage Applications Alert Standard FormatAlert Description 273 Dell Client Manager DCM Padlock Ring and Security Cable Slot Option SettingsPhysical Security Chassis Intrusion Detection Trusted Platform Module TPM Enabling the TPM Feature275 276 Security Management SoftwareComputer Tracking Software About Smart Cards and Fingerprint Readers System Password Password Protection277 Type the password and press Enter 279 Administrator Password Overview System SetupDisabling a Forgotten Password and Setting a New Password Entering System Setup System Setup Options System Setup Screens281 282 Internal default 283 No Boot setting Performance 284 Computrace server 285 Suspend 286Event Log 287 Boot Sequence Memory Key Booting to a USB Device Mini Tower and Desktop Small Form Factor Advanced Features Jumper Settings289 Ultra Small Form Factor Computer Jumper Setting Description Clearing Forgotten Passwords 291 Clearing Cmos Settings Hyperthreading and Multi-Core Technology Power Management for Windows XP and Windows VistaOptions in Windows XP 293 Options in Windows Vista 295 About RAID Configurations RAID Level Verifying That RAID Is WorkingSegment Hard drive Configuring Your Computer for RAID RAID Level 1 Configuration297 Creating a RAID Level 1 Configuration Creating a RAID Level 0 Configuration 299 Creating a RAID Level 1 Configuration Migrating to a RAID Level 1 Configuration Migrating to a RAID Level 0 Configuration301 Advanced Features 303 BatteryReplacing the Battery Battery Battery 305 306 307 Replacing the System BoardReplacing the System Board 308 Mini Tower System Board Screws 309 Desktop System Board Screws 310 Small Form Factor System Board Screws 311 Ultra Small Form Factor System Board Screws 312 DDR2 Memory Overview Memory313 Installing Memory Addressing Memory Configurations Crossbar Memory connector closest to Securing clips Processor315 Cutouts Memory module Removing Memory 317 Replacing the Computer CoverMini-Tower, Desktop, and Small Form Factor Computers Ultra Small Form Factor Computers 318 Installing Your Computer in an Enclosure Installing Your Computer in an Enclosure319 320 321 Installing Your Computer in an Enclosure Computer, Keyboard, and Monitor Cleaning Your ComputerCleaning a Non-Optical Mouse Cleaning an Optical Mouse CDs and DVDs Floppy Drive Microsoft Windows XP Microsoft Windows FeaturesMicrosoft Windows XP Features Transferring Information to a New Computer Microsoft Windows XP Features Click Finished and restart the new computer Microsoft Windows Vista327 Network device Network adapter connector on computer Setting Up a Home and Office NetworkConnecting to a Network Adapter Network Setup 329 330 Solving Problems TroubleshootingBattery Problems Card Problems 332 Drive Problems 333 Optical drive problemsProblems writing to an optical drive Hard drive problems Windows XP Click Start→ All Programs→ Modem Helper Mail, Modem, and Internet Problems334 Click Properties→ Tools→ Check Now 335 Lockups and Software Problems Keyboard Problems Solid blue screen appears Other software problemsProgram crashes repeatedly Program is designed for an earlier Windows operating system Mouse Problems Memory Problems338 339 Network ProblemsPower Problems Troubleshooting Power Problems 340 Power Supply Self-Test 341 Printer Problems 342 Scanner ProblemsSound and Speaker Problems No sound from speakers 343 Video and Monitor ProblemsNo sound from headphones Screen is blank Screen is difficult to read 3D image quality is poor Power Lights System Lights Power Light Problem Description Suggested Resolution345 346 Power Light Problem Description Light Pattern Problem Description Diagnostic Lights347 348 Light Pattern Problem Description Suggested Resolution 349 350 Beep CodesCode Cause 351 System MessagesMessage Possible Cause Corrective Action Message Possible Cause 352 Product Information Guide Dell DiagnosticsWhen to Use the Dell Diagnostics 353 Solving Problems Option Function 355Tab Function Drivers What Is a Driver?Identifying Drivers 357 Reinstalling Drivers and Utilities 358 To start the Hardware Troubleshooter Using Microsoft Windows System RestoreYou can restore your operating system in the following ways Restoring Your Operating System Starting System Restore Using PC Restore Using Dell PC Restore and Dell Factory Image Restore361 Image Restore Removing PC Restore 363 Using the Operating System MediaClick Finish to reboot the computer Click Exit if the Install Windows message appears Solving Problems 365 Online ServicesGetting Help Obtaining Assistance Automated Order-Status Service AutoTech ServiceSupport Service Before You Call Problems With Your Order367 Guide 368 369 Contacting Dell Warranty Warranty371 372 FCC Notices US Only FCC Notices U.S. OnlyFCC Class B 373 374 375 Glossary 376 377 378 379 380 381 382 383 384 Video resolution See resolution 385 386