Dell™ OptiPlex™ 980 Service Manual—DesktopWorking on Your ComputerSpecificationsRemoving and Replacing PartsSystem Board LayoutSystem SetupDiagnosticsNotes, Cautions, and WarningsNOTE: A NOTE indicates important information that helps you make better use of your computer.CAUTION: A CAUTION indicates potential damage to hardware or loss of data if instructions are not followed.WARNING: A WARNING 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 notapplicable.Information in this document is subject to change without notice.© 2010 Dell Inc. All rights reserved.Reproduction of this material in any manner whatsoever without the written permission of Dell Inc. is strictly forbidden.Trademarks used in this text: Dell, the DELL logo, and OptiPlex are trademarks of Dell Inc.; Intel, Pentium, and Core are either trademarks or registeredtrademarks of Intel Corporation; Microsoft, Windows, Windows Vista, and the Windows Vista start button are either trademarks or registered trademarks ofMicrosoft Corporation in the United States and/or other countries.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.May 2010 Rev. A00