Dell™Dimension™C521ServiceManual 
Before You Begin  
About Your Computer  
Technical Overview  
Removing the Computer Cover  
Specifications  
Troubleshooting  
System Setup  
Removing and Installing Parts  
Replacing the Computer Cover  
Notes, Notices, and Cautions 
Information in this document is subject to change without notice. 
©2006DellInc.Allrightsreserved. 
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