Adding and Replacing Parts 83Adding and Replacing PartsBefore You BeginThis chapter provides procedures for removing and installing the components in your computer.Unless otherwise noted, each procedure assumes that the following conditions exist:• You have performed the steps in "Turning Off Your Computer" (see this page) and "BeforeWorking Inside Your Computer" (see page 84).• You have read the safety information in your Dell™ Product Information Guide.• A component can be replaced or—if purchased separately—installed by performing theremoval procedure in reverse order.Recommended ToolsThe procedures in this document may require the following tools:• Small flat-blade screwdriver• Phillips screwdriver• Small plastic scribe• Flash BIOS update program (see the Dell Support website at support.dell.com)Turning Off Your ComputerNOTICE: To avoid losing data, save and close any open files and exit any open programs before you turnoff your computer.1 Shut down the operating system:a Save and close any open files, exit any open programs, click the Start button, and thenclick Turn Off Computer.b In the Turn off computer window, click Turn off.The computer turns off after the operating system shutdown process finishes.2 Ensure that the computer and any attached devices are turned off. If your computer andattached devices did not automatically turn off when you shut down your operating system,press and hold the power button for at least 8–10 seconds until the computer turns off.
