Numark Mixdeck Issue...Please help

Hello everyone, I'm new to this site but I've heard good things about the community here so I figured it was time to try it out. Anyway my problem is this, have been using a Numark Mixdeck for a few months now, and just the other day, channel 2, only plays through the left speaker. But channel 1, plays through both left and right speakers. I thought this was an issue with Traktor at first, but then I tested it out with cd's and usb flash drives, and it did the same thing. I know it's not an issue with panning. What could this be? And if it is a soundcard issue, would this be expensive to fix? Thanks in advance!