This repair guide will help to remove the backplate of the Lenovo Thinkpad Edge E520 which is essential to repair the inner components of the laptop.
Flip over the laptop and position it with the battery being furthest away from you.
Remove the four screws on the edges of the T-Shaped plate.
Remove the T-Shaped plate from the back of the computer. It should come off easily if all four aforementioned screws are removed.
Screw length 6.35 mm, head 3.175 mm