Working on Your Computer 35Working on Your ComputerThis document provides procedures for removing and installing thecomponents in your computer. Unless otherwise noted, each procedureassumes that:• You have performed the steps in "Working on Your Computer" on page 35.• You have read the safety information that shipped with your computer.• When replacing a component, you have already removed the original, ifinstalled.NOTE: The color of your computer and certain computer components may appeardifferently than shown in this document.Recommended ToolsThe procedures in this document may require the following tools:• Small flat-blade screwdriver• Phillips screwdriver• Small plastic scribe• Flash BIOS update (see the Dell Support website at support.dell.com)Before Working on Your ComputerUse the following safety guidelines to help protect your computer frompotential damage and to help ensure your own personal safety.CAUTION: Before working inside your computer, read the safety information thatshipped with your computer. For additional safety best practices information, seethe Regulatory Compliance Homepage at www.dell.com/regulatory_compliance.CAUTION: Many repairs may only be done by a certified service technician. Youshould only perform troubleshooting and simple repairs as authorized in yourproduct documentation, or as directed by the online or telephone service andsupport team. Damage due to servicing that is not authorized by Dell is not coveredby your warranty. Read and follow the safety instructions that came with theproduct.