Dell C521 specifications September 2006 Rev. A00

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Dell™ Dimension™ C521 Service Manual

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. © 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.; AMD, AMD Athlon, and combinations thereof, Sempron, and Cool 'n' Quiet are trademarks of Advanced Micro Devices, Inc; Microsoft and Windows are registered trademarks of Microsoft Corporation.

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 September 2006 Rev. A00 Front View About Your ComputerBack View of the Computer Back Panel I/O ConnectorsBack to Contents Turning Off Your Computer Before You BeginGetting Started Recommended ToolsPage Replacing the Computer Cover Removing the Computer Cover DDR2 Memory Overview Removing and Installing PartsMemory Installing Memory Removing Memory CardsInstalling an Expansion Card Removing an Expansion Card Drives Connecting and Disconnecting Drive Cables General Installation GuidelinesDrive Interface Connectors Power Cable ConnectorRemoving a CD/DVD Drive Installing a CD/DVD DriveCD/DVD Drive Removing a Floppy Drive Floppy DriveInstalling a Floppy Drive Removing a Media Card Reader Media Card ReaderInstalling a Media Card Reader Removing a Hard Drive Hard DriveInstalling a Hard Drive Replacing the Battery BatteryRemoving the Processor ProcessorInstalling the Processor Page Replacing the Power Supply Power SupplyRemoving the Front I/O Panel Front I/O PanelRemoving the Fan Assembly Fan AssemblyInstalling the Front I/O Panel Removing the System Board Installing the Fan AssemblySystem Board Replacing the System Board Page Specifications Controls and Lights ConnectorsDrives Environmental PowerPhysical Overview System SetupEntering System Setup OverviewSystem System Setup Options64MB Post Behavior Boot MenuJumper Locations Clearing Password Settings Clearing Forgotten Passwords and Cmos SettingsClearing Cmos Settings Flashing the BiosSystem Board Components Technical OverviewInside View of Your Computer Jumper Setting Description Jumper SettingsPin Number Signal name AWG Wire Power Supply DC Connector Pin AssignmentsDC Power Connector P1 DC Power Connector P5 and P6 DC Power Connector P2DC Power Connector P3 DC Power Connector P4Black +12 VDC Yellow September 2006 Rev. A00 Dell Diagnostics Main Menu TroubleshootingDell Diagnostics When to Use the Dell DiagnosticsSystem Lights Diagnostic LightsPower Light Problem Description Suggested Resolution Problem Description Suggested ResolutionCode Cause Beep Codes