Before You Begin 91Before You BeginThis manual provides procedures for removing and installing components inyour computer. Unless otherwise noted, each procedure assumes that thefollowing conditions exist:• You have performed the steps in "Turning Off Your Computer" on page 9and "Before Working Inside Your Computer" on page 10.• You have read the safety information that shipped with your computer.• A component can be replaced or—if purchased separately—installed byperforming the removal procedure in the reverse order.Recommended ToolsThe procedures in this document may require the following tools:• Small flat-blade screwdriver• Phillips screwdriver• Plastic scribe• BIOS executable update program available at support.dell.comTurning Off Your ComputerCAUTION: To avoid losing data, save and close all open files and exit all openprograms before you turn off your computer.1 Save and close all open files and exit all open programs.2 Click the Start button and then click Shut Down.The computer turns off after the operating system shutdown processfinishes.3 Ensure that the computer is turned off. If your computer did notautomatically turn off when you shut down the operating system, pressand hold the power button until the computer turns off.
