2 Slide the dummy SIM card tray out of the system.Base coverRemoving base cover1 Follow the procedure in Before working inside your computer.2 To release the base cover:a Remember: Exercise caution when loosening the screws. Angle the screw driver to match the head of thescrew to avoid a possible stripped screw head.Loosen the M2.5 x 6.0 captive screws that secure the base cover to the computer [1].b Use a plastic scribe to release the base cover from the edge of the computer as show in the figure [2].Removing and installing components 9