Adding and Replacing Parts 1231Adding 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" on page 123 and "BeforeWorking Inside Your Computer" on page 124.• 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• Small Phillips screwdriver• Small plastic scribe• Flash BIOS update program CDTurning 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 Start→ Shut Down→ Shutdown→ ΟΚ.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 4 seconds.
