Adding and Replacing Parts 121To remove fan 3:1 Unscrew the two captive screws labeled "F3."2 Lift the fan out of the computer.NOTE: The cover on this fan is not removable. It remains attached to the fan.Hinge CoversCAUTION: Before you begin this procedure, read the safety instructions at the front of this document(see page 11).NOTICE: To avoid electrostatic discharge, ground yourself by using a wrist grounding strap or byperiodically touching a connector on the back panel of the computer.NOTICE: To avoid damaging the system board, you must remove the main battery before you beginworking inside the computer.1 Follow the procedures in "Before You Begin" (see page 103).NOTE: The hinge cover consists of three separate pieces: the left cover, the right cover, and the centercover. To remove computer components, you must remove all three covers except when removing thekeyboard or the reserve battery. For these two components, remove only the center cover.fan covercaptive screws (2)