I just got a Majesty guitar and have a problem. When I play it for about an hour, it starts shutting down. It just goes silent. If I pull out the guitar cable and put it back in it will work the first couple of times, but then after that, I have to leave it unplugged for a few minutes for it to come back on, then it repeats the process of dying. Anyone have a clue as to what this might be? Guitar is brand new. Cables are new as well.