There are x7 small screws on the inside upper panel that have to be removed as well as x4 long screws under the feet of the machine.

I had to turn on my machine and send a project to it to have the cutter mechanism move out of the way to remove some of the screws. Once all the screws have been removed the case can be pulled away, but you have to be careful when removing because there are some wires connecting the buttons on the case to the harddrive.