Adding and Replacing Parts 75Adding 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"Before Working Inside Your Computer" (see page 76).• You have read the safety information in your Dell™ Product Information Guide.• A component can be replaced—or if purchased separately—installed by performing the removalprocedure 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 (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 turn offyour computer.1 Shut down the operating system:a Save and close any open files, exit any open programs, click the Start button, and then clickTurn 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 and attacheddevices did not automatically turn off when you shut down your operating system, press and holdthe power button for 4 seconds.
