Hi all I seem to have a problem with my Behringer mixer and I didn't know where else to put this question so I put it here. The problem is that the left side of the audio in the main mix doesn't work. In PFL mode (pre-fader listen) the audio comes through both sides but when I depress the main mix button to go to fader mode it only comes through one side, the right. I put the L fader of the main mix section all the way up and still nothing. Do you think thing it's a bad fuse or something? If you were wondering it's a MX2004A and any help would be great.