So I ordered a b-stock 6505+ that had been reduced as it didn't have the original box. When it arrived it didn't work, futher investigation showed that the mains fuse was blown. The blown fuse I took out was a 1A time delay blow fuse however on the case of the amp it says to use 3.15A fast blow fuses. After replacing the fuse with the correct type the amp seems to be working fine apart from the fact that the green LED for the crunch channel doesnt seem to be working. Does anyone know if this could be a sign of a more serious underlying issue or has someone in the shop just underfused it? As far as I can tell the blown fuse isn't due to problems with the transformer or power tubes. I still have the option of returning the amp to the shop, but only for a few more days. As it is b-stock I don't get a full warranty either so I'm a little undecided as to wether or not I should send it back.