So a buddy of mine gave me his 2.1 system. As far as he knows, it was working when he last used it. However when I tried to start it up, I get nothing but the click sound. The control pod doesn't light up and I get no audio coming through. I thought the issue was with the control pod, but I purchased a new one and still get the same issue as before. Where would I start to diagnose where the issue is coming from?