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Dell 755 100, One3.5-inch floppy drive or media card reader, One Sata optical drive, Port adapter

Models: 755

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Drives

Externally accessible	one One eSATA drive (optional)
Internally accessible	• two SATA (Serial ATA) hard drives
	• one3.5-inch floppy drive or media card reader
	• one SATA optical drive

Connectors

External connectors:
Serial	9-pin connector; 16550C-compatible
Parallel	25-pin connector (bidirectional)
Video	15-pin VGA connector
Network adapter	RJ45 connector
Optional PS/2 with secondary serial	two 6-pin mini-DINs
port adapter
USB	two front-panel and six back panel USB 2.0–compliant connectors
Audio	two connectors for line-in/ microphone and line-out; two front-
	panel connectors for headphones and microphone
System board connectors:
SATA	three 7-pin connectors
eSATA	one 7-pin connector
Internal USB	10-pin header for optional media card reader (in 3.5-inch drive bay)
Floppy drive	34-pin connector
Serial	12-pin connector for optional secondary PS/2 serial port card
Fan	5-pin connector
PCI Express	one 120-pin (x16) connector
PCI 2.3	two 120-pin connectors
Front panel	40-pin connector

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Desktop Computer Specifications

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Dell 755 manual 100, One3.5-inch floppy drive or media card reader, One Sata optical drive, Port adapter, Internal USB

Contents

Dell OptiPlex User’s Guide W . d e l l . c o m s u p p o r t . d e l l . c o mSeptember JN460 Contents Connecting and Disconnecting Drive Cables General Drive Installation GuidelinesDC Power Connectors P3, P5, P8, and P9 Desktop Computer General Drive Installation Guidelines 127 Connecting and Disconnecting Drive Cables 129DC Power Connector P5 and P6 160 Contents 127Small Form Factor Computer Specifications 175 163About Your Small Form Factor Computer 165 166Connecting and Disconnecting Drive Cables 196 197199 202Ultra Small Form Factor Computer Specifications 241 Connecting and Disconnecting Drive Cables 248About Your Ultra Small Form Factor Computer 227 228Installing a Device When Your Computer Is Turned Off 255 About Smart Cards and Fingerprint Readers 276 Contents255 258Deleting or Changing an Existing System Password 278 Deleting or Changing an Existing Administrator Password 280277 278Configuring Power Management Settings 295 294295 296Addressing Memory Configurations 314 313316 Mini-Tower, Desktop, and Small Form Factor Computers 317Problems writing to an optical drive 333 Mail, Modem, and Internet Problems 334Troubleshooting Power Problems 339 329Using Microsoft Windows System Restore 359 Undoing the Last System Restore 360Using Dell PC Restore and Dell Factory Image Restore 361 Windows Vista Dell Factory Image Restore 362Returning Items for Warranty Repair or Credit 367 365366 367How to set up my computer Finding InformationDesktop System Software DSS Support.dell.comWhat Are You Looking For? Find It Here Warranty information Dell Product Information GuideOrder status, warranty, and repair information UpdatesSegment, and enter your Service Tag For your configuration How to use Windows XPNot ship with your computer System you orderedBefore You Begin Recommended ToolsBefore Working Inside Your Computer Turning Off Your ComputerBefore You Begin Mini Tower Computer About Your Mini Tower ComputerFront View Mini Tower ComputerBlinking green The computer is in a power-saving mode Power problem may exist see Power Problems on21 for more information No light The computer is turned offBack 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 Chassis Intrusion Switch Inside Your ComputerRemoving the Chassis Intrusion Switch Replacing the Chassis Intrusion SwitchResetting the Chassis Intrusion Detector System Board Components SATA3 Mini Tower Computer Mini Tower Computer Specifications Connectors Connector sizeConnector data width Maximum PCI Express ConnectorsDrives Two Sata Serial ATA hard drivesOne3.5-inch floppy drive or media reader Two Sata optical drivesAC power source Wattage Controls and LightsHeat dissipation Rating VoltageWeight Physical HeightWidth DepthMini Tower Specifications Cards Installing a PCI or PCI Express CardCards Cards Cards Cards Removing a PCI or PCI Express Card Card-edge connector Card connector Card retention latch Alignment guidePS/2 Serial Port Adapter Card retention latchCard fully seated Card not fully seated Bracket within slot Cards Card retention latch Alignment guide Installing eSATA Cards General Drive Installation Guidelines DrivesPower Cable Connectors Sata ConnectorHard 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 Connectors DC Power Connector P1Pin Number Signal name AWG Wire DC Power Connectors P3, P5, P8, and P9 DC Power Connector P2Pin Number Signal Name DC Power Connector P7 DC Power Connector P10Speakers Installing a SpeakerSpeakers Removing a Speaker Desktop Computer About Your Desktop ComputerYour Computer on page 21 for more information Desktop ComputerBlinking or solid amber See Power Problems on Power Management for Windows XP and Windows Vista onPosition 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 SpecificationsPCI without riser-card cage Connectors Maximum PCI Express without riser-card Cage ConnectorsBoard Card or a DVI graphics card for dual-monitor supportMaximum ESATA Desktop Computer Specifications Expansion Bus Connector sizeMaximum 100 One3.5-inch floppy drive or media card readerOne Sata optical drive Port adapterPower source Wattage 101102 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 ESATA 123Expansion Cards 125 Replace the riser 127 128 Drive Inserts 129130 131 Drive release latch Optical drive 133 134 135 Drive insert 137 Information Guide DrivesDrive 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 Pin Signal name 18-AWG Number Wire 158159 DC Power Connector P3 DC Power Connector P4DC Power Connector P5 and P6 160161 162 163 164 Small Form Factor Computer About Your Small Form Factor Computer165 Small Form Factor Computer166 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 177 Port adapter Video178 179 180 181 Expansion Cards 183 184 PCI Express and DVI Cards 185186 187 Expansion Cards 189 Expansion Cards 191 PS2/SERIAL2 193 Expansion Cards General Installation Guidelines 195Serial 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 Replacing a Media Card Reader 211Drives 213 Installing the Processor 215 Processor 217 Replacing the I/O Panel 219 Mounting screw Pin Signal Name Number 221222 Pin Signal 18-AWG Number Name Wire DC Power Connectors P3223 DC Power Connector P6 DC Power Connector P5224 225 226 Ultra Small Form Factor Computer About Your Ultra Small Form Factor Computer227 3 4Blinking or solid yellow See Power Problems on Side View228 Management for Windows XP and Windows Vista on229 Network controller is turned off in system setup Connecting Two Monitors 231232 233 Removing the Chassis Intrusion Switch 235 236 Cable Cover Optional 237Connecting the AC Power Adapter Information GuideDell Badge 239240 Ultra Small Form Factor Computer Specifications 241Ultra Small Form Factor Computer Specifications 242243 244 AC power sourcePhysical 245 246 Your computer supports One Sata serial ATA hard drive 247248 249 Drives 251 Drives 253 Drives Installing a Device When Your Computer Is Turned Off Module Bay255 Module BayBottom of computer Security screw 257 Latch release Securing a Device in the Module Bay 259260 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 ManageabilityError Message Description Active Management Technology270 Advanced Functionality271 Dell OpenManage Applications Alert Standard FormatAlert Description Dell Client Manager DCM 273Option Settings Physical SecurityChassis Intrusion Detection Padlock Ring and Security Cable SlotTrusted Platform Module TPM Enabling the TPM Feature275 Security Management Software Computer Tracking SoftwareAbout Smart Cards and Fingerprint Readers 276System Password Password Protection277 Type the password and press Enter Administrator Password 279System Setup Disabling a Forgotten Password and Setting a New PasswordEntering System Setup OverviewSystem Setup Options System Setup Screens281 Internal default 282No Boot setting 283284 Performance285 Computrace serverSuspend 286Event Log Boot Sequence 287Booting to a USB Device Memory KeyMini Tower and Desktop Small Form Factor Advanced Features Jumper Settings289 Clearing Forgotten Passwords Ultra Small Form Factor Computer Jumper Setting DescriptionClearing Cmos Settings 291Hyperthreading and Multi-Core Technology Power Management for Windows XP and Windows VistaOptions in Windows XP 293 Options in Windows Vista About RAID Configurations 295RAID Level Verifying That RAID Is WorkingSegment Hard drive Configuring Your Computer for RAID RAID Level 1 Configuration297 Creating a RAID Level 0 Configuration Creating a RAID Level 1 Configuration299 Creating a RAID Level 1 Configuration Migrating to a RAID Level 1 Configuration Migrating to a RAID Level 0 Configuration301 Advanced Features Battery Replacing the BatteryBattery 303Battery 305 306 307 Replacing the System BoardReplacing the System Board Mini Tower System Board Screws 308Desktop System Board Screws 309Small Form Factor System Board Screws 310Ultra Small Form Factor System Board Screws 311312 DDR2 Memory Overview Memory313 Addressing Memory Configurations Installing MemoryMemory connector closest to Securing clips Processor 315Cutouts Memory module CrossbarRemoving Memory Replacing the Computer Cover Mini-Tower, Desktop, and Small Form Factor ComputersUltra Small Form Factor Computers 317318 Installing Your Computer in an Enclosure Installing Your Computer in an Enclosure319 320 321 Installing Your Computer in an Enclosure Cleaning Your Computer Cleaning a Non-Optical MouseCleaning an Optical Mouse Computer, Keyboard, and MonitorFloppy Drive CDs and DVDsMicrosoft Windows Features Microsoft Windows XP FeaturesTransferring Information to a New Computer Microsoft Windows XPMicrosoft Windows XP Features Click Finished and restart the new computer Microsoft Windows Vista327 Setting Up a Home and Office Network Connecting to a Network AdapterNetwork Setup Network device Network adapter connector on computer329 330 Troubleshooting Battery ProblemsCard Problems Solving ProblemsDrive Problems 332Optical drive problems Problems writing to an optical driveHard drive problems 333Mail, Modem, and Internet Problems 334Click Properties→ Tools→ Check Now Windows XP Click Start→ All Programs→ Modem Helper335 Keyboard Problems Lockups and Software ProblemsOther software problems Program crashes repeatedlyProgram is designed for an earlier Windows operating system Solid blue screen appearsMouse Problems Memory Problems338 Network Problems Power ProblemsTroubleshooting Power Problems 339Power Supply Self-Test 340Printer Problems 341Scanner Problems Sound and Speaker ProblemsNo sound from speakers 342Video and Monitor Problems No sound from headphonesScreen is blank Screen is difficult to read 343Power Lights 3D image quality is poorSystem Lights Power Light Problem Description Suggested Resolution345 Power Light Problem Description 346Light Pattern Problem Description Diagnostic Lights347 Light Pattern Problem Description Suggested Resolution 348349 350 Beep CodesCode Cause 351 System MessagesMessage Possible Cause Corrective Action 352 Message Possible CauseDell Diagnostics When to Use the Dell Diagnostics353 Product Information GuideSolving Problems Option Function 355Tab Function Drivers What Is a Driver?Identifying Drivers Reinstalling Drivers and Utilities 357358 Using Microsoft Windows System Restore You can restore your operating system in the following waysRestoring Your Operating System To start the Hardware TroubleshooterStarting System Restore Using PC Restore Using Dell PC Restore and Dell Factory Image Restore361 Removing PC Restore Image RestoreUsing the Operating System Media Click Finish to reboot the computerClick Exit if the Install Windows message appears 363Solving Problems Online Services Getting HelpObtaining Assistance 365Automated Order-Status Service AutoTech ServiceSupport Service Before You Call Problems With Your Order367 368 Guide369 Contacting Dell Warranty Warranty371 372 FCC Notices U.S. Only FCC Class B373 FCC Notices US Only374 Glossary 375376 377 378 379 380 381 382 383 Video resolution See resolution 384385 386