I thought I had already tried that but to make sure I went out again today and removed the fuse, removed all the connections actually, put it back together and turned it back on. With the volume turned up at full high, Zone A is dead, no sound at all. Zone B & C, with volume on full high, will yield a very low volume with continuous muffled static (if this makes sense). It is almost as if someone were holding a cloth over the speakers. I am not sure what else we could try but, as mentioned prior, the unit hardly had any hours on it at all. We were actually in the middle of listening to it when it went silent. Any help would be appreciated. Thanks.