4.Press and eject any installed cards from the Media Card Reader.
5.Disconnect your computer and all attached devices from their electrical outlets.
6.Disconnect all attached devices from your computer.
CAUTION: To help prevent damage to the system board, remove the main battery (see Removing the Battery) before working inside the computer.
7.Remove the battery (see Removing the Battery).
8.Turn the computer
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.
