Removing and Installing Parts 1073 Press the power button to ground the system board.CAUTION: 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.4 Open the computer cover.NOTICE: Before touching anything inside your computer, ground yourself bytouching an unpainted metal surface, such as the metal at the back of the computer.While you work, periodically touch an unpainted metal surface to dissipate staticelectricity, which could harm internal components.Removing the Computer CoverCAUTION: Before you begin any of the procedures in this section, follow thesafety instructions in the Product Information Guide.CAUTION: To guard against electrical shock, always unplug your computer fromthe electrical outlet before removing the cover.CAUTION: Do not operate your equipment with any cover(s) (including computercovers, bezels, filler brackets, front-panel inserts, etc.) removed.1 Follow the procedures in "Before You Begin" on page 105.NOTICE: Ensure that sufficient space exists to support the removed cover.NOTICE: Ensure that you are working on a level, protected surface to avoidscratching either the computer or the surface on which it is resting.2 Lay your computer on its side with the computer cover facing up.3 Remove the two screws securing the cover, using a screwdriver.
