Insert the flat edge of a spudger between the faceplate and the outer casing near the power button.

Run your spudger along the edge of the faceplate to release the clips securing it to the front of the console.

You may also accomplish this task by using the edge of the Xbox 360 opening tool, but it may scratch the plastic case.

Alternatively, you can use your hands to carefully pull the faceplate away from the Xbox.