Dell OptiPlex 755 Quick Reference Guide
Dell OptiPlex 755Quick Reference GuideModels DCTR, DCNE, DCSM, and DCCYw w w. d e l l . c o m s u p p o r t . d e l l . c o m
Notes, Notices, and CautionsNOTE: A NOTE indicates important information that helps you make better use ofyour computer.NOTICE: A NOTICE indicates either potential damage to hardware or loss of dataand 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 strictlyforbidden.Trademarks used in this text: Dell, the DELL logo, OptiPlex, Inspiron, Dimension, Latitude, DellPrecision, DellNet, TravelLite, OpenManage, PowerVault, Axim, PowerEdge, PowerConnect,PowerApp, and StrikeZone are trademarks of Dell Inc.; Intel, Pentium, SpeedStep, and Celeron areregistered trademarks and Core and vPro are trademarks of Intel Corporation in the U.S and othercountries; Microsoft, MS-DOS, Windows, Windows Vista, and the Windows Vista Start button are eitherregistered trademarks or trademarks of Microsoft Corporation in the United States and/or othercountries; IBM is a registered trademark of International Business Machines Corporation; Bluetoothis a trademark owned by Bluetooth SIG, Inc. and is used by Dell Inc. under license. ENERGY STARis a registered trademark of the U.S. Environmental Protection Agency. As an ENERGY STAR partner,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 claimingthe marks and names or their products. Dell Inc. disclaims any proprietary interest in trademarks andtrade names other than its own.Models: DCTR, DCNE, DCSM, and DCCYJuly 2007FN389Rev. A00
ContentsFinding Information. . . . . . . . . . . . . . . . . . . .Setting Up Your Computer . . . . . . . . . . . . . . .510. . . . . . . . .11Set Up Your Monitor. . . . . . . . . . . . . . . .12Power Connections. . . . . . . . . . . . . . . .12. . . . . . . . . . . . . . . . . . . .13Set Up Your Keyboard and MouseBefore You BeginRecommended Tools. . . . . . . . . . . . . . . .Turning Off Your Computer. . . . . . . . . . . . .13. . . . . .14. . . . . . . . . . . . . . . . . .16. . . . . . . . . . . . . . . . . . .16Before Working Inside Your Computer .Mini Tower ComputerSystem Views .13. . . . . . . . . .22. . . . . . . . . . . . . . .24Removing the Computer Cover .Inside Your Computer. . . . . . . . . . . .25. . . . . . . . . . . . . . . . . .26Desktop Computer . . . . . . . . . . . . . . . . . . .27System Views . . . . . . . . . . . . . . . . . . .27System Board ComponentsJumper Settings. . . . . . . . . .32. . . . . . . . . . . . . . .33Removing the Computer Cover .Inside Your Computer. . . . . . . . . . . .35. . . . . . . . . . . . . . . . . .36System Board ComponentsJumper SettingsSmall Form Factor ComputerSystem Views . . . . . . . . . . . . . .37. . . . . . . . . . . . . . . . . . .37Removing the Computer Cover . . . . . . . . . .Contents433
Inside Your Computer . . . . . . . . . . . . . . . . . . . . . . . . . .46. . . . . . . . . . . . . . . . . .47System Board Components .Jumper SettingsUltra Small Form Factor ComputerSystem Views. . . . . . . . . . .48. . . . . . . . . . . . . . . . . . . .48. . . . . . . . . . .55Inside Your Computer . . . . . . . . . . . . . . .56Cable Cover (Optional). . . . . . . . . . . . . . .57System Board ComponentsRemoving the Computer Cover. . . . . . . . . . . . . . .59. . . . . . . . . . . . . . . . . .60. . . . . . . . . . . . . . . . . . . .61Jumper SettingsSolving Problems. . . . . . . . . . . . . . . . . .61. . . . . . . . . . . . . . . . . . . .65Dell DiagnosticsSystem LightsDiagnostic LightsBeep Codes . . . . . . . . . . . . . . . . . .66. . . . . . . . . . . . . . . . . . . .70Resolving Software and HardwareIncompatibilities . . . . . . . . . .Restoring Your Operating System. . . . . . . .72. . . . . . . . .73Using Microsoft Windows System RestoreUsing Dell PC Restore and Dell FactoryImage Restore . . . . . . . . . . . . . .73. . . . .7578. . . . . . . . . .79. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .83Reinstalling Drivers and Utilities4. . . . . . . . . .Using the Drivers and Utilities MediaIndex44Contents
Finding InformationNOTE: Some features or media may be optional and may not ship with yourcomputer. 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 computerDrivers and Utilities Media Drivers for my computerNOTE: The Drivers and Utilities media may Desktop System Software (DSS)be optional and may not ship with yourcomputer.Documentation and drivers are alreadyinstalled on your computer. You can usethe media to reinstall drivers (see"Reinstalling Drivers and Utilities" onpage 79), to run the Dell Diagnostics (see"Dell Diagnostics" on page 61).Readme files may be included on yourmedia to provide last-minute updatesabout technical changes to your computeror advanced technical-reference materialfor technicians or experienced users.NOTE: Drivers and documentation updatescan be found at support.dell.com.Quick Reference Guide5
What Are You Looking For?Find It Here How to set up my computerOwner’s Manual How to run the Dell DiagnosticsNOTE: This document may be optional and Error codes and diagnostic lightsmay not ship with your computer. Tools and utilities How to set up a printer How to troubleshoot and solve problems How to remove and install partsNOTE: This document is available as a PDFat support.dell.com. Warranty informationDell Product Information Guide Terms and Conditions (U.S. only) Safety instructions Regulatory information Ergonomics information End User License Agreement How to remove and replace partsDell OptiPlex User’s GuideMicrosoft Windows Help and SupportCenter How to configure system settings1 Click Start or Help and How to troubleshoot and solve problemsSupport Dell User and SystemGuides System Guides.2 Click the User’s Guide for yourcomputer. Specifications6Quick Reference Guide
What Are You Looking For?Find It Here Service Tag and Express Service CodeService Tag and Microsoft Windows License Microsoft Windows License LabelThese labels are located on yourcomputer. Use the Service Tag to identify yourcomputer when you usesupport.dell.com or contact support. Enter the Express Service Code to directyour call when contacting support.NOTE: As an increased security measure,the newly designed Microsoft Windowslicense label incorporates a missing portionor "hole" to discourage removal of the label.Quick Reference Guide7
What Are You Looking For?Find It Here Solutions — Troubleshooting hints andtips, articles from technicians, andonline courses, frequently askedquestionsDell Support Website — support.dell.comNOTE: Select your region or businesssegment to view the appropriate supportsite. Community — Online discussion withother Dell customers Upgrades — Upgrade information forcomponents, such as memory, the harddrive, and the operating system Customer Care — Contact information,service call and order status, warranty,and repair information Service and support — Service callstatus and support history, servicecontract, online discussions withtechnical support Dell Technical Update Service —Proactive e-mail notification of softwareand 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 Desktop System Software (DSS)— IfTo download Desktop System Software:you reinstall the operating system for1 Go to support.dell.com and clickyour computer, you should also reinstallDrivers & Downloads.the DSS utility. DSS provides critical2 Enter your Service Tag or Product Typeupdates for your operating system andand Product Model, and click Go.support for processors, optical drives,3 Scroll to System and ConfigurationUSB devices, and so on. DSS isUtilities Dell Notebook Systemnecessary for correct operation of yourSoftware and click Download Now.Dell computer. The software4 Select Drivers & Downloads andautomatically detects your computerclick Go.and operating system and installs theupdates appropriate for yourNOTE: The support.dell.com user interfaceconfiguration.may vary depending on your selections.8Quick Reference Guide
What Are You Looking For?Find It Here How to use Windows XPWindows Help and Support Center1 To access Windows Help and Support: In Windows XP, click Start and clickHelp and Support. In Windows Vista , click theWindows Vista Start buttonandclick Help and Support.2 Type a word or phrase that describesyour problem, and then click the arrowicon.3 Click the topic that describes yourproblem.4 Follow the instructions on the screen. How to work with programs and files How to personalize my desktop How to reinstall my operating systemOperating System MediaNOTE: The Operating System media may beoptional and may not ship with yourcomputer.The operating system is already installedon your computer. To reinstall youroperating system, use the OperatingSystem media. See "Restoring YourOperating System" in your User’s Guide orOwner’s Manual.Quick Reference Guide9
What Are You Looking For?Find It HereAfter you reinstall your operating system,use the Drivers and Utilities media toreinstall drivers for the devices that camewith your computer.Your operating system product key label islocated on your computer.NOTE: The color of your CD varies basedon the operating system you ordered.Setting Up Your ComputerCAUTION: Before performing any of the procedures in this section, follow thesafety instructions in Product Information Guide.NOTICE: If your computer has an expansion card installed (such as a modemcard), connect the appropriate cable to the card, not to the connector on the backpanel.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 storagecompartment that might prevent air circulation around the chassis. See yourProduct Information Guide for more information.NOTE: Before you install any devices or software that did not ship with yourcomputer, read the documentation that came with the device or software, orcontact the vendor to verify that the device or software is compatible with yourcomputer and operating system.You must complete all the steps to properly set up your computer. See theappropriate 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 adapter2 Connect the modem or network cable.Insert the network cable, not the telephone line, into the networkconnector. If you have an optional modem, connect the telephone line tothe modem.10Quick Reference Guide
3 Connect the monitor.Align and gently insert the monitor cable to avoid bending connector pins.Tighten the thumbscrews on the cable connectors.NOTE: Some monitors have the video connector underneath the back of thescreen. See the documentation that came with your monitor for its connectorlocations.4 Connect the speakers.5 Connect power cables to the computer, monitor, and devices and connectthe other ends of the power cables to electrical outlets.NOTICE: To avoid damaging a computer with a manual voltage-selection switch,set the switch for the voltage that most closely matches the AC power available inyour location.NOTICE: In Japan, the voltage selection switch must be set to the 115-V positioneven though the AC power available in Japan is 100 V.6 Verify that the voltage selection switch is set correctly for your location.Your computer has a manual voltage-selection switch. Computers with avoltage selection switch on the back panel must be manually set to operateat the correct operating voltage.Set Up Your Keyboard and MouseQuick Reference Guide11
Set Up Your MonitorPower Connections12Quick Reference Guide
Before You BeginThis chapter provides procedures for removing and installing the componentsin your computer. Unless otherwise noted, each procedure assumes that thefollowing conditions exist: You have performed the steps in "Turning Off Your Computer" on page 13and "Mini Tower Computer" on page 16. You have read the safety information in your Dell Product InformationGuide. A component can be replaced by performing the removal procedure inreverse order.Recommended ToolsThe procedures in this document may require the following tools: Small flat-blade screwdriver Phillips screwdriver Flash BIOS update program floppy disk or CDTurning Off Your ComputerNOTICE: To avoid losing data, save and close all open files and exit all openprograms before you turn off your computer.1 Shut down the operating system:aSave and close all open files and exit all open programs.bIn the Microsoft Windows XP operating system, click Start ShutDown Shut down.In the Microsoft Windows Vista operating system, click theWindows Vista Start Button, in the lower-left corner of thedesktop, click the arrow in the lower-right corner of the Start menu asshown below, and then click Shut Down.The computer turns off after the operating system shutdown process iscomplete.Quick Reference Guide13
NOTICE: Ensure that the computer and all attached devices are turned off. If yourcomputer and attached devices did not automatically turn off when you shut downyour operating system, press and hold the power button for about 4 seconds to turnthem off.Before Working Inside Your ComputerUse the following safety guidelines to help protect your computer frompotential damage and to help ensure your own personal safety.CAUTION: Before you begin any of the procedures in this section, follow thesafety instructions in the Product Information Guide.CAUTION: Handle components and cards with care. Do not touch the componentsor contacts on a card. Hold a card by its edges or by its metal mounting bracket.Hold a component such as a processor by its edges, not by its pins.NOTICE: Only a certified service technician should perform repairs on yourcomputer. Damage due to servicing that is not authorized by Dell is not covered byyour warranty.NOTICE: When you disconnect a cable, pull on its connector or on its strain-reliefloop, not on the cable itself. Some cables have a connector with locking tabs; if youare disconnecting this type of cable, press in on the locking tabs before youdisconnect the cable. As you pull connectors apart, keep them evenly aligned toavoid bending any connector pins. Also, before you connect a cable, ensure thatboth connectors are correctly oriented and aligned.NOTICE: To avoid damaging the computer, perform the following steps before youbegin working inside the computer.1 Turn off your computer.2 If the computer is connected to a docking device (docked), undock it. Seethe documentation that came with your docking device for instructions.NOTICE: To disconnect a network cable, first unplug the cable from your computerand then unplug it from the network wall jack.3 Disconnect all telephone or network cables from the computer.4 Disconnect your computer and all attached devices from their electricaloutlets, and then press the power button to ground the system board.5 If applicable, remove the computer stand (for instructions, see thedocumentation that came with the stand) and the cable cover, if attached(see "Cable Cover (Optional)" on page 57).14Quick Reference Guide
CAUTION: To guard against electrical shock, always unplug your computer fromthe electrical outlet before removing the cover.6 Remove the computer cover. For a mini tower computer, see "Removing the Computer Cover" onpage 22. For a desktop computer, see "Removing the Computer Cover" onpage 32. For a small form factor computer, see "Removing the ComputerCover" on page 43. For an ultra small form factor computer, see "Removing the ComputerCover" on page 55.NOTICE: Before touching anything inside your computer, ground yourself bytouching an unpainted metal surface, such as the metal at the back of the computer.While you work, periodically touch an unpainted metal surface to dissipate anystatic electricity that could harm internal components.Quick Reference Guide15
Mini Tower ComputerSystem ViewsFront View12311451069781615.25-inch drivebayCan contain an optical drive. Insert a CD or DVD(if supported) into this drive.25.25-inch drivebayCan contain an optical drive. Insert a CD or DVD(if supported) into this drive.Quick Reference Guide
33.5-inch drivebayCan contain an optional floppy drive or optional media cardreader.4USB 2.0connectors (2)Use the front USB connectors for devices that you connectoccasionally, such as joysticks or cameras, or for bootableUSB devices (see your online User’s Guide for moreinformation on booting to a USB device).It is recommended that you use the back USB connectorsfor devices that typically remain connected, such as printersand keyboards.5LAN indicatorlightThis light indicates that a LAN (local area network)connection is established.6diagnostic lightsUse the lights to help you troubleshoot a computer problembased on the diagnostic code. For more information, see"Diagnostic Lights" on page 66.7power buttonPress this button to turn on the computer.NOTICE: To avoid losing data, do not turn off thecomputer by pressing the power button. Instead,perform an operating system shutdown. See "TurningOff Your Computer" on page 13 for more information.NOTICE: If your operating system has ACPI enabled,when you press the power button the computer willperform an operating system shutdown.Quick Reference Guide17
8power lightThe power light illuminates and blinks or remains solid toindicate different operating modes: No light — The computer is turned off. Steady green — The computer is in a normal operatingstate. Blinking green — The computer is in a power-saving mode Blinking or solid amber — The computer is receivingelectrical power, but an internal power problem may exist(see "Power Problems" in the User’s Guide).To exit from a power-saving mode, press the power button oruse the keyboard or the mouse if it is configured as a wakedevice in the Windows Device Manager. For moreinformation about sleep modes and pwoer-saving mode, see"Advanced Features’ in the User’s Guide.See "Diagnostic Lights" on page 66 for a description of lightcodes that can help you troubleshoot problems with yourcomputer.189hard driveactivity lightThis light flickers when the hard drive is being accessed.10headphoneconnectorUse the headphone connector to attach headphones andmost kinds of speakers.11microphoneconnectorUse the microphone connector to attach a microphone.Quick Reference Guide
Back View1234561 cover-releaselatchThis latch allows you to open the computer cover.2 padlock ringInsert a padlock to lock the computer cover.Quick Reference Guide19
3 voltage selectionswitchYour computer is equipped with a manual voltage-selectionswitch. To help avoid damaging a computer with a manualvoltage-selection switch, set the switch for the voltage thatmost closely matches the AC power available in yourlocation.NOTICE: In Japan, the voltage selection switch must beset to the 115-V position.Also, ensure that your monitor and attached devices areelectrically rated to operate with the AC power available inyour location.4 power connectorInsert the power cable.5 back panelconnectorsPlug serial, USB, and other devices into the appropriateconnectors. See "Back Panel Connector
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
“OSHA-MIOSHA” specifications. . Dell Core 2 Duo Optiplex 755 F9WNGF1 Dell Core 2 Duo Optiplex 755 7K1VQH1 Dell Core 2 Duo Optiplex 960 17G4RL1 Dell Core 2 Duo Optiplex 960 4GTSYH1 Dell Core 2 Duo Optiplex 960 2NXTGK1 Dell Core 2 Duo Optiplex 960 4QB1KN1
www.dell.com support.dell.com Dell OptiPlex 755 Quick Reference Guide Models DCTR, DCNE, DCSM, and DCCY. Notes, Notices, and Cautions . product specifications, and white papers Downloads — Certified drivers, patches, and software updates Dell
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