Dell OptiPlex 755 User manual

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Dell™ OptiPlex™ 755
Quick Reference Guide
Models DCTR, DCNE, DCSM, and DCCY

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.
____________________
Information in this document is subject to change without notice.
© 2007 Dell Inc. All rights reserved.
Reproduction in any manner whatsoever without the written permission of Dell Inc. is strictly
forbidden.
Trademarks used in this text: Dell, the DELL logo, OptiPlex, Inspiron, Dimension, Latitude, Dell
Precision, DellNet, TravelLite, OpenManage, PowerVault, Axim, PowerEdge, PowerConnect,
PowerApp, and StrikeZone are trademarks of Dell Inc.; Intel, Pentium, SpeedStep, and Celeron are
registered trademarks and Core and vPro are trademarks of Intel Corporation in the U.S and other
countries;Microsoft,MS-DOS,Windows,WindowsVista,andtheWindowsVistaStartButtonareeither
registered trademarks or trademarks of Microsoft Corporation in the United States and/or other
countries; IBM is a registered trademark of International Business Machines Corporation; Bluetooth
is a trademark owned by Bluetooth SIG, Inc. and is used by Dell Inc. under license. ENERGY STAR
isaregisteredtrademarkoftheU.S.EnvironmentalProtectionAgency.AsanENERGYSTARpartner,
Dell Inc. has determined that this product meets the ENERGY STAR guidelines for energy efficiency.
Other trademarks and trade names may be used in this document to refer to either the entities claiming
the marks and names or their products. Dell Inc. disclaims any proprietary interest in trademarks and
trade names other than its own.
Models: DCTR, DCNE, DCSM, and DCCY
July 2007 FN390 Rev. A00

Contents 3
Contents
Finding Information . . . . . . . . . . . . . . . . . . . . 5
Setting Up Your Computer . . . . . . . . . . . . . . . . 10
Set Up Your Keyboard and Mouse . . . . . . . . . 11
Set Up Your Monitor . . . . . . . . . . . . . . . . 12
Power Connections . . . . . . . . . . . . . . . . 12
Before You Begin . . . . . . . . . . . . . . . . . . . . 13
Recommended Tools . . . . . . . . . . . . . . . . 13
Turning Off Your Computer . . . . . . . . . . . . . 13
Before Working Inside Your Computer . . . . . . . 14
Mini Tower Computer . . . . . . . . . . . . . . . . . . 16
System Views . . . . . . . . . . . . . . . . . . . . 16
Removing the Computer Cover . . . . . . . . . . . 22
Inside Your Computer . . . . . . . . . . . . . . . 24
System Board Components . . . . . . . . . . . . 25
Jumper Settings . . . . . . . . . . . . . . . . . . 26
Desktop Computer . . . . . . . . . . . . . . . . . . . . 27
System Views . . . . . . . . . . . . . . . . . . . . 27
Removing the Computer Cover . . . . . . . . . . . 32
Inside Your Computer . . . . . . . . . . . . . . . 33
System Board Components . . . . . . . . . . . . 35
Jumper Settings . . . . . . . . . . . . . . . . . . 36
Small Form Factor Computer . . . . . . . . . . . . . . 37
System Views . . . . . . . . . . . . . . . . . . . . 37
Removing the Computer Cover . . . . . . . . . . . 43

4Contents
Inside Your Computer . . . . . . . . . . . . . . . . 44
System Board Components . . . . . . . . . . . . . 46
Jumper Settings . . . . . . . . . . . . . . . . . . 47
Ultra Small Form Factor Computer . . . . . . . . . . . 48
System Views . . . . . . . . . . . . . . . . . . . . 48
Removing the Computer Cover . . . . . . . . . . . 55
Inside Your Computer . . . . . . . . . . . . . . . . 56
Cable Cover (Optional) . . . . . . . . . . . . . . . 57
System Board Components . . . . . . . . . . . . . . . 59
Jumper Settings . . . . . . . . . . . . . . . . . . 60
Solving Problems . . . . . . . . . . . . . . . . . . . . 61
Dell Diagnostics . . . . . . . . . . . . . . . . . . 61
System Lights . . . . . . . . . . . . . . . . . . . . 65
Diagnostic Lights . . . . . . . . . . . . . . . . . . 66
Beep Codes . . . . . . . . . . . . . . . . . . . . . 70
Resolving Software and Hardware
Incompatibilities . . . . . . . . . . . . . . . . . . 72
Restoring Your Operating System . . . . . . . . . 73
Using Microsoft Windows System Restore . . . . 73
Using Dell™ PC Restore and Dell Factory
Image Restore . . . . . . . . . . . . . . . . . . . 75
Using the Drivers and Utilities Media . . . . . . . 78
Reinstalling Drivers and Utilities . . . . . . . . . . 79
Index . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 83

Quick Reference Guide 5
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 for my computer
• Desktop System Software (DSS)
Drivers and Utilities Media
NOTE: The Drivers and Utilities media may
be optional and may not ship with your
computer.
Documentation and drivers are already
installed on your computer. You can use
the media to reinstall drivers (see
"Reinstalling Drivers and Utilities" on
page 79), to run the Dell Diagnostics (see
"Dell Diagnostics" on page 61).
Readme files may be included on your
media to provide last-minute updates
about technical changes to your computer
or advanced technical-reference material
for technicians or experienced users.
NOTE: Drivers and documentation updates
can be found at support.dell.com.

6Quick Reference Guide
• How to set up my computer
• How to run the Dell Diagnostics
• Error codes and diagnostic lights
• Tools and utilities
• How to set up a printer
• How to troubleshoot and solve problems
• How to remove and install parts
Owner’s Manual
NOTE: This document may be optional and
may not ship with your computer.
NOTE: This document is available as a PDF
at support.dell.com.
• Warranty information
• Terms and Conditions (U.S. only)
• Safety instructions
• Regulatory information
• Ergonomics information
• End User License Agreement
Dell™ Product Information Guide
• How to remove and replace parts
• Specifications
• How to configure system settings
• How to troubleshoot and solve problems
Dell™ OptiPlex™ User’s Guide
Microsoft Windows Help and Support
Center
1 Click Start or → Help and
Support
→ Dell User and System
Guides
→ System Guides .
2 Click the User’s Guide for your
computer.
What Are You Looking For? Find It Here

Quick Reference Guide 7
• Service Tag and Express Service Code
• Microsoft Windows License Label
Service Tag and Microsoft
®
Windows
®
License
These labels are located on your
computer.
• Use the Service Tag to identify your
computer when you use
support.dell.com or contact support.
• Enter the Express Service Code to direct
your call when contacting support.
NOTE: As an increased security measure,
the newly designed Microsoft Windows
license label incorporates a missing portion
or "hole" to discourage removal of the label.
What Are You Looking For? Find It Here

8Quick Reference Guide
• Solutions — Troubleshooting hints and
tips, articles from technicians, and
online courses, frequently asked
questions
• Community — Online discussion with
other Dell customers
• Upgrades — Upgrade information for
components, such as memory, the hard
drive, and the operating system
• Customer Care — Contact information,
service call and order status, warranty,
and repair information
• Service and support — Service call
status and support history, service
contract, online discussions with
technical support
• Dell Technical Update Service —
Proactive e-mail notification of software
and hardware updates for your computer
• Reference — Computer documentation,
details on my computer configuration,
product specifications, and white papers
• Downloads — Certified drivers, patches,
and software updates
Dell Support Website — support.dell.com
NOTE: Select your region or business
segment to view the appropriate support
site.
• Desktop System Software (DSS)— If
you reinstall the operating system for
your computer, you should also reinstall
the DSS utility. DSS provides critical
updates for your operating system and
support for processors, optical drives,
USB devices, and so on. DSS is
necessary for correct operation of your
Dell computer. The software
automatically detects your computer
and operating system and installs the
updates appropriate for your
configuration.
To download Desktop System Software:
1 Go to support.dell.com and click
Drivers & Downloads.
2 Enter your Service Tag or Product Type
and Product Model, and click
Go .
3 Scroll to System and Configuration
Utilities
→ Dell Notebook System
Software
and click Download Now .
4 Select Drivers & Downloads and
click
Go .
NOTE: The support.dell.com user interface
may vary depending on your selections.
What Are You Looking For? Find It Here

Quick Reference Guide 9
• How to use Windows XP
• How to work with programs and files
• How to personalize my desktop
Windows Help and Support Center
1 To access Windows Help and Support:
• In Windows XP, click
Start and click
Help and Support
.
• In Windows Vista™, click the
Windows Vista Start button
and
click
Help and Support .
2 Type a word or phrase that describes
your problem, and then click the arrow
icon.
3 Click the topic that describes your
problem.
4 Follow the instructions on the screen.
• 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 "Restoring Your
Operating System" in your User’s Guide or
Owner’s Manual.
What Are You Looking For? Find It Here

10 Quick Reference Guide
Setting Up Your Computer
CAUTION: Before performing any of the procedures in this section, follow the
safety instructions in Product Information Guide.
NOTICE: If your computer has an expansion card installed (such as a modem
card), connect the appropriate cable to the card, not to the connector on the back
panel.
NOTICE: To help allow the computer to maintain proper operating temperature,
ensure that you do not place the computer too close to a wall or other storage
compartment that might prevent air circulation around the chassis. See your
Product Information Guide for more information.
NOTE: Before you install any devices or software that did not ship with your
computer, read the documentation that came with the device or software, or
contact the vendor to verify that the device or software is compatible with your
computer and operating system.
You must complete all the steps to properly set up your computer. See the
appropriate figures that follow the instructions.
NOTICE: Do not attempt to operate a PS/2 mouse and a USB mouse simultaneously.
1 Connect the keyboard and mouse.
NOTICE: Do not connect a modem cable to the network adapter connector.
Voltage from telephone communications can cause damage to the network adapter
2 Connect the modem or network cable.
Insert the network cable, not the telephone line, into the network
connector. If you have an optional modem, connect the telephone line to
the modem.
After you reinstall your operating system,
use the Drivers and Utilities media to
reinstall drivers for the devices that came
with your computer.
Your operating system product key label is
located on your computer.
NOTE: The color of your CD varies based
on the operating system you ordered.
What Are You Looking For? Find It Here