When I'm using my Macbook normally, on a table or any other flat surface, sound only comes from the left speaker. But as soon as I put some pressure on the underside of the mac on the right side, the right speaker suddenly starts working, and continues to work as long as I'm still applying the pressure. And as soon as i take the pressure off, the right side speaker stops working again. (As in, no sound comes from it). Is this a loose conection like i thought? How would i go about fixing this problem? Thanks in advance :)