Cita de zdavatz:

What is an EMI Finger???

That black screw needs to come out because it goes all the way through the computer into the back of the keyboard. However, I didn't see any EMI finger, unless that's the purpose of the metal directly underneath it. EMI fingers are those little tin foil like things you'll see along the ports inside the computer. They provide shielding from what I presume stand for electro-magnetic interference.