Dell E521 specifications Model Dcsm

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Dell™ Dimension™ E521 Service Manual

Before You Begin

About Your Computer

Technical Overview

Specifications

Advanced Troubleshooting

System Setup

Removing and Installing Parts

Model DCSM

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.

If you purchased a Dell™ n Series computer, any references in this document to Microsoft® Windows® operating systems are not applicable.

Information in this document is subject to change without notice. © 2006 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, and Dimension are trademarks of Dell Inc.; Microsoft and Windows are registered trademarks of Microsoft Corporation; AMD, Athlon, and Sempron are trademarks of Advanced Micro Devices, Inc.

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.

September 2006 Rev. A00

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Contents Model Dcsm Front View of the Computer About Your ComputerBack View of the Computer Back Panel ConnectorsBack to Contents Power Lights Advanced TroubleshootingDiagnostic Lights Light Pattern Problem Description Suggested ResolutionSystem Messages Beep CodesCode Cause Diskette read failure Click the Change or Remove Program iconStarting the Dell Diagnostics Dell DiagnosticsWhat Is a Driver? Dell Diagnostics Main MenuDrivers Identifying DriversUsing Windows XP Device Driver Rollback Reinstalling DriversManually Reinstalling Drivers Windows XPClick Start, then click Help and Support Resolving Software and Hardware IncompatibilitiesGetting Started Before You BeginRecommended Tools Turning Off Your ComputerBack to Contents Removing the Computer Cover Removing and Installing PartsMemory Memory Installation GuidelinesInstalling Memory Addressing Memory With 4-GB ConfigurationsRemoving Memory CardsPCI Cards Installing a PCI CardPage Removing a PCI Card PCI Express Cards Installing a PCI Express CardPage Removing a PCI Express Card Removing the Drive Panel Drive PanelInstalling the Drive Panel Installing the Drive-Panel InsertRemoving the Drive-Panel Insert Drives Connecting Drive CablesConnecting and Disconnecting Drive Cables Drive Interface ConnectorsHard Drive Removing a Hard Drive Installing a Hard DrivePage Adding a Second Hard Drive Floppy DriveRemoving a Floppy Drive Installing a Floppy Drive Removing a Media Card Reader Media Card ReaderInstalling a Media Card Reader Removing a CD/DVD Drive CD/DVD DriveInstalling a CD/DVD Drive Page Power Supply BatteryReplacing the Battery Replacing the Power Supply Removing the Processor ProcessorInstalling the Processor Page Removing the I/O Panel PanelProcessor Fan Installing the I/O PanelRemoving the Processor Fan Installing the Processor Fan Removing the System Board System BoardSystem Board Screws Installing the System Board Installing the Computer CoverBack to Contents September 2006 Rev. A00 Specifications Drives ConnectorsControls and Lights Physical PowerEnvironmental Entering System Setup System SetupSystem Setup Screen OverviewOnboard Devices System Setup OptionsNot Set Bypass isUnlocked Option Settings Boot SequenceChanging Boot Sequence for the Current Boot Setup & Boot MenuChanging Boot Sequence for Future Boots Clearing Forgotten PasswordsFlashing the Bios Clearing Cmos SettingsClick Save this program to disk, and then click OK Inside View of Your Computer Technical OverviewSystem Board Components Pin Number Signal name AWG Wire Power Supply DC Connector Pin AssignmentsDC Power Connector P2 DC Power Connector P10