We will start by removing the cover that covers the cards and that also covers the screws, which will allow us to later remove the back cover.

Withdrawing the cards will be as simple as you can see in the images. We will simply pull them until they leave.

We will remove the two screws that were behind the cover of the casing and then, with the help of an opening tool, we will unhook the notches that hold the back casing to the frame.

To finish, we desoldamos the microphone of the motherboard and desencajamos of the frame.