I have an Axiom EP500 v2 subwoofer that will not power up. When you turn it on there is not green led light. I did the obvious changing outlets and looking at the fuses. I visually inspected all six fuses and they do not appear to be burned. The ceramic fuse I took down to the local Radio Shack and they tested the fuse and they said that fuse was good. Any suggestions as to what I should do next. Thanks.