Reply to S2 Headphone whine

Hi all,

Probably a simple fix for this one, I've done some searching but can't find anything related.

I've had my S2 for a while now and never had any problems until I fired it up today. I'm getting a continuous tone through my headphones when I turn on, it doesn't go away if I hit cue or change the volume knob.

I've played around with the output routing in Traktor and found that the monitor output is to blame. As soon as anything is assigned to the left monitor channel, the tone is heard. Ive tried swapping channels but nothing seems to work.

Anyone got any ideas/had this before?

Any help much appreciated!