Cross fader popping on a DDJ T1

I was practicing a bit the other day on my DDJ T1 and had a track playing on deck B and when I went to cue up a track on deck A all sound cut off as soon as I hit the cue button (and yes I did hit the right cue button). I tried moving the crossfader to see what happened and each time I did my speakers popped. Also, tracks on deck A and C wouldn't play unless I held down the cue button. I turned off the T1 and restarted Traktor and everything started working fine again and it hasn't happened since. But I was wondering what could have caused this? My best guess would be a short in the hardware or a bad connection. Anybody else have a clue?