253 | Dell 755 specs

3Remove the hard drive fan:

a Remove the screw that secures the fan release tab to the hard drive bracket.

b Press down on the fan release tab, and then slide the fan towards the front of the computer so that its side tabs are free of the corresponding slots in the hard drive bracket.

c Lift to remove the fan from the hard drive bracket. d Unplug the fan.

4

3

2

1

5

1hard drive bracket

2screw

3fan release tab

4fan

5side tab

Drives

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Image 253

Dell 755 manual 253

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 Connecting and Disconnecting Drive Cables 129 General Drive Installation Guidelines 127DC Power Connector P5 and P6 160 Contents 127 163 Small Form Factor Computer Specifications 175About Your Small Form Factor Computer 165 166 197 Connecting and Disconnecting Drive Cables 196199 202 Connecting and Disconnecting Drive Cables 248 Ultra Small Form Factor Computer Specifications 241About Your Ultra Small Form Factor Computer 227 228 About Smart Cards and Fingerprint Readers 276 Contents Installing a Device When Your Computer Is Turned Off 255255 258 Deleting or Changing an Existing Administrator Password 280 Deleting or Changing an Existing System Password 278277 278 294 Configuring Power Management Settings 295295 296 313 Addressing Memory Configurations 314316 Mini-Tower, Desktop, and Small Form Factor Computers 317 Mail, Modem, and Internet Problems 334 Problems writing to an optical drive 333Troubleshooting Power Problems 339 329 Undoing the Last System Restore 360 Using Microsoft Windows System Restore 359Using Dell PC Restore and Dell Factory Image Restore 361 Windows Vista Dell Factory Image Restore 362 365 Returning Items for Warranty Repair or Credit 367366 367 Finding Information How to set up my computerDesktop System Software DSS Support.dell.com Dell Product Information Guide What Are You Looking For? Find It Here Warranty information Updates Order status, warranty, and repair informationSegment, and enter your Service Tag For your configuration How to use Windows XP System you ordered Not ship with your computer Recommended Tools Before You BeginBefore Working Inside Your Computer Turning Off Your Computer Before You Begin About Your Mini Tower Computer Mini Tower ComputerFront View Mini Tower Computer Power problem may exist see Power Problems on Blinking green The computer is in a power-saving mode21 for more information No light The computer is turned off 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 Connector size ConnectorsConnector data width Maximum PCI Express Connectors Two Sata Serial ATA hard drives DrivesOne3.5-inch floppy drive or media reader Two Sata optical drives Controls and Lights AC power source WattageHeat dissipation Rating Voltage Physical Height WeightWidth Depth 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 About Your Desktop Computer Desktop ComputerYour Computer on page 21 for more information Desktop Computer 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 Maximum PCI Express without riser-card Cage Connectors PCI without riser-card cage ConnectorsBoard Card or a DVI graphics card for dual-monitor support Maximum ESATA Desktop Computer Specifications Expansion Bus Connector sizeMaximum One3.5-inch floppy drive or media card reader 100One Sata optical drive Port adapter 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 DC Power Connector P4 DC Power Connector P3DC Power Connector P5 and P6 160 161 162 163 164 About Your Small Form Factor Computer Small Form Factor Computer165 Small Form Factor Computer 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 About Your Ultra Small Form Factor Computer Ultra Small Form Factor Computer227 3 4 Side View Blinking or solid yellow See Power Problems on228 Management for Windows XP and Windows Vista on 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 Off255 Module Bay 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 Advanced Features Advanced FeaturesLegacySelect Technology Control Manageability Active Management Technology Error Message Description270 Advanced Functionality 271 Dell OpenManage Applications Alert Standard FormatAlert Description 273 Dell Client Manager DCM Physical Security Option SettingsChassis Intrusion Detection Padlock Ring and Security Cable Slot Trusted Platform Module TPM Enabling the TPM Feature275 Computer Tracking Software Security Management SoftwareAbout Smart Cards and Fingerprint Readers 276 System Password Password Protection277 Type the password and press Enter 279 Administrator Password Disabling a Forgotten Password and Setting a New Password System SetupEntering System Setup Overview 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 Replacing the Battery BatteryBattery 303 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 315 Memory connector closest to Securing clips ProcessorCutouts Memory module Crossbar Removing Memory Mini-Tower, Desktop, and Small Form Factor Computers Replacing the Computer CoverUltra Small Form Factor Computers 317 318 Installing Your Computer in an Enclosure Installing Your Computer in an Enclosure319 320 321 Installing Your Computer in an Enclosure Cleaning a Non-Optical Mouse Cleaning Your ComputerCleaning an Optical Mouse Computer, Keyboard, and Monitor CDs and DVDs Floppy Drive Microsoft Windows XP Features Microsoft Windows FeaturesTransferring Information to a New Computer Microsoft Windows XP Microsoft Windows XP Features Click Finished and restart the new computer Microsoft Windows Vista327 Connecting to a Network Adapter Setting Up a Home and Office NetworkNetwork Setup Network device Network adapter connector on computer 329 330 Battery Problems TroubleshootingCard Problems Solving Problems 332 Drive Problems Problems writing to an optical drive Optical drive problemsHard drive problems 333 334 Mail, Modem, and Internet ProblemsClick Properties→ Tools→ Check Now Windows XP Click Start→ All Programs→ Modem Helper 335 Lockups and Software Problems Keyboard Problems Program crashes repeatedly Other software problemsProgram is designed for an earlier Windows operating system Solid blue screen appears Mouse Problems Memory Problems338 Power Problems Network ProblemsTroubleshooting Power Problems 339 340 Power Supply Self-Test 341 Printer Problems Sound and Speaker Problems Scanner ProblemsNo sound from speakers 342 No sound from headphones Video and Monitor ProblemsScreen is blank Screen is difficult to read 343 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 When to Use the Dell Diagnostics Dell Diagnostics353 Product Information Guide Solving Problems Option Function 355Tab Function Drivers What Is a Driver?Identifying Drivers 357 Reinstalling Drivers and Utilities 358 You can restore your operating system in the following ways Using Microsoft Windows System RestoreRestoring Your Operating System To start the Hardware Troubleshooter Starting System Restore Using PC Restore Using Dell PC Restore and Dell Factory Image Restore361 Image Restore Removing PC Restore Click Finish to reboot the computer Using the Operating System MediaClick Exit if the Install Windows message appears 363 Solving Problems Getting Help Online ServicesObtaining Assistance 365 Automated Order-Status Service AutoTech ServiceSupport Service Before You Call Problems With Your Order367 Guide 368 369 Contacting Dell Warranty Warranty371 372 FCC Class B FCC Notices U.S. Only373 FCC Notices US Only 374 375 Glossary 376 377 378 379 380 381 382 383 384 Video resolution See resolution 385 386