5.From the front of the computer, grasp the sides of the cover and pull it straight toward you until it stops, just before it reaches the front of the computer. Then lift it off at an angle as shown below.
6.Set the cover aside.
7.Ground yourself to the computer by touching the metal surface of the back panel.
WARNING
Be sure to ground yourself by touching the back panel of the computer every time you remove the cover. If you are not properly grounded, you could generate an electric shock that could damage a component when you touch it.
Installing and Removing Options 4 - 5