Removing and Installing Parts 103Removing and Installing PartsCAUTION: To guard against likelihood of electric shock, laceration by moving fanblades or other unexpected injuries, always unplug your computer from theelectrical outlet before opening the cover.CAUTION: Do not operate your computer with any cover(s) (including computercovers, bezels, filler brackets, front-panel inserts, and so on) removed.CAUTION: Some of the parts described in this chapter may be replaceable bya certified service technician only and are not custom replaceable.Before You BeginThis chapter provides procedures for removing and installing the componentsin your computer. Unless otherwise noted, each procedure assumes that thefollowing conditions exist:• You have performed the steps in "Turning Off Your Computer" on page 104and "Before Working Inside Your Computer" on page 104.• You have read the safety information in the Dell™ Product Information Guide.• A component can be replaced or—if purchased separately—installed byperforming the removal 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 executable update program on the Dell Support website atsupport.dell.com
