3.Disconnect your computer and all attached devices from their electrical outlets.
4.Disconnect all attached devices from your computer.
5.Open the display and press the power button to ground the system board.
CAUTION: Before touching anything inside your computer, ground yourself by touching 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 static electricity, which could harm internal components.
