Dell 755 - page 221

Power Supply 221

DC Power Connectors

NOTE: The power supply installed in your computer is one of two options as illustrated below.

DC Power Connector P1

Number

Signal Name 18-

AWG

Wire

1 +3.3 VDC Orange

2 +3.3 VDC Orange

3 GND Black

4 VCC (+5 V) Red

5 GND Black

6 VCC (+5 V) Red

13 14 15 16 17 18 19 20 21 22 23 24

1 2 3 4 5 6 7 8 9 10 11 12

Contents

Main Notes, Notices, and Cautions Contents 1 Finding Information 2 Before You Begin 3 Mini Tower Computer 4 Mini Tower Computer Specifications Page 5 Desktop Computer 6 Desktop Computer Specifications Page 7 Small Form Factor Computer Page 8 Ultra Small Form Factor Computer 9 Advanced Features Page 10 Battery 11 Replacing the System Board 12 Memory 13 Replacing the Computer Cover 14 Installing Your Computer in an Enclosure 15 Cleaning Your Computer 16 Microsoft Windows Features 17 Troubleshooting Page 18 Getting Help 19 Warranty 20 FCC Notices (U.S. Only) Glossary . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 375 Finding Information NOTE: 18 NOTE: 20 NOTE: Before You Begin Recommended Tools Turning Off Your Computer Before Working Inside Your Computer Page Mini Tower Computer About Your Mini Tower Computer 24 25 Page Page Page Page Page Page Page Page Page Mini Tower Computer Specifications NOTE: 36 Page 38 NOTE: Page Page Installing a PCI or PCI Express Card Page Page Page Removing a PCI or PCI Express Card Page Page Page Page Page Installing eSATA Page General Drive Installation Guidelines Page Page Page Page Page Page Page Page Page Page Page Page Page Page Page Page Page Page Page Page Page Page Page Page Page Page Page Page Page DC Power Connectors P3, P5, P8, and P9 DC Power Connector P7 DC Power Connector P10 Page Page 87 Desktop Computer About Your Desktop Computer 88 NOTE: Page Page Page Page Removing the Heat Sink Assembly Page Page Desktop Computer Specifications NOTE: Page Page Page Page Page PCI Cards Page Page Page Page Page Page Page Page Page Page Page Page Page Page Page Page Page Page Page eSATA Page Page Page General Drive Installation Guidelines Page Drive Inserts Page Page Page Page Page Page Page Page Page Page Page Page Page Page Page Page Page Page Page Page Page Page Page Page Page Page Page Page Page Page DC Power Connector P3 DC Power Connector P4 DC Power Connector P5 and P6 Page Page Page Page 165 Small Form Factor Computer About Your Small Form Factor Computer 166 NOTE: Page Page Page Page Page Page Page Small Form Factor Computer Specifications 176 NOTE: 178 Page Page PCI Cards Page Page Page PCI Express and DVI Cards Page Page Page Page Page Page Page eSATA Page General Installation Guidelines Page Page Page Page Page Page Replacing a Hard Drive Fan Page Page Page Page Page Page Page Page Page Page Page Page Page Page Page Page Page Page Page Page DC Power Connectors P3 DC Power Connector P5 DC Power Connector P6 Page Page Ultra Small Form Factor Computer About Your Ultra Small Form Factor Computer 228 Side View Page 230 Connecting a VGA Monitor NOTE: Page Page Page Page Page Page Cable Cover (Optional) Connecting the AC Power Adapter Dell Badge Page Ultra Small Form Factor Computer Specifications 242 Page 244 NOTE: Page Page General Installation Guidelines Page Page Page Page Page Page Page Module Bay Installing a Device When Your Computer Is Turned Off Page Page Removing and Installing a Device When Your Computer Is Running Microsoft Windows Securing a Device in the Module Bay Page Page Page Page Page Page Page Page Page Advanced Features LegacySelect Technology Control Manageability DASH Active Management Technology Page Alert Standard Format Dell OpenManage Applications Dell Client Manager (DCM) Physical Security Chassis Intrusion Detection Option Settings Padlock Ring and Security Cable Slot Trusted Platform Module (TPM) Enabling the TPM Feature Security Management Software Computer Tracking Software About Smart Cards and Fingerprint Readers Password Protection System Password Page Administrator Password Disabling a Forgotten Password and Setting a New Password System Setup Overview Entering System Setup System Setup Screens System Setup Options 282 NOTE: Autodetect/AHCI NOTE: 284 NOTE: 0-n Chassis Intrusion Intrusion Detected NOTE: 286 NOTE: Boot Sequence Booting to a USB Device Memory Key Jumper Settings Clearing Forgotten Passwords Clearing CMOS Settings Hyperthreading and Multi-Core Technology Power Management for Windows XP and Windows Vista Options in Windows XP Page Options in Windows Vista About RAID Configurations Verifying That RAID Is Working RAID Level 0 RAID Level 1 Configuration Configuring Your Computer for RAID Page Page Recovering From a Single Hard Drive Failure (RAID 1) Using the Intel Matrix Storage Manager Migrating to a RAID Level 0 Configuration Migrating to a RAID Level 1 Configuration Page Battery Replacing the Battery Page Page Page Replacing the System Board Page Page Page Ultra Small Form Factor System Board Screws Page Memory DDR2 Memory Overview Addressing Memory Configurations Installing Memory Page Removing Memory Replacing the Computer Cover Mini-Tower, Desktop, and Small Form Factor Computers Ultra Small Form Factor Computers Page Installing Your Computer in an Enclosure Page Page Page Cleaning Your Computer Computer, Keyboard, and Monitor Mouse Cleaning a Non-Optical Mouse Cleaning an Optical Mouse Floppy Drive CDs and DVDs Microsoft Windows Features Transferring Information to a New Computer Microsoft Windows XP Page Microsoft Windows Vista Setting Up a Home and Office Network Connecting to a Network Adapter Network Setup Page Page Troubleshooting Battery Problems Card Problems 332 Drive Problems Close the computer cover Optical drive problems Problems writing to an optical drive Hard drive problems 334 E-Mail, Modem, and Internet Problems Error Messages 336 Keyboard Problems Lockups and Software Problems The computer does not start up The computer stops responding A program stops responding A program crashes repeatedly A program is designed for an earlier Windows operating system A solid blue screen appears Other software problems 338 Memory Problems press the up- and down-arrow keys Mouse Problems Network Problems Power Problems Troubleshooting Power Problems 340 Power Supply Self-Test Printer Problems 342 Scanner Problems Sound and Speaker Problems No sound from speakers No sound from headphones Video and Monitor Problems The screen is blank DVI-to-VGA The screen is difficult to read 344 Power Lights System Lights Page Diagnostic Lights Page Page Beep Codes System Messages Page Dell Diagnostics When to Use the Dell Diagnostics Page Page Drivers What Is a Driver? Identifying Drivers Reinstalling Drivers and Utilities Page Restoring Your Operating System Using Microsoft Windows System Restore Page Using Dell PC Restore and Dell Factory Image Restore Page Using the Operating System Media Page Getting Help Obtaining Assistance Online Services AutoTech Service Automated Order-Status Service Support Service Problems With Your Order Product Information Returning Items for Warranty Repair or Credit Before You Call Page Page Contacting Dell Page Page FCC Notices (U.S. Only) FCC Class B Page Glossary A B C D E F G H I K L M N O P R S T U V W X Z