Epson ActionTower 3000 Computer - Manuel (Page 46)

5. Grasp the sides of the cover and pull it straight back, until it
clears the computer.
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 3-3