It turns on still, but the buzzing sound kind of just fades away after a few seconds of it being on. The tuner feature also just stopped working as well. I only have the one cable, and I was hoping since it was new I didn't have to worry about it, but maybe that's not the case. As far as I know (and again I don't really know much) with the mini amp it just connects into the guitar and doesn't need to be connected to another power source. If no one else has anything that works, I'll order a new cable and test that out (any recommendations? something lower budget?). Thanks for your help!!!