2001 Tundra Stereo not functional

I'm thinking there's a fuse blown. I replaced the fuse in the fuse box....is there another one on the power line? I can't see one without taking the radio out. I'd like to find out first whether there is one there and replace it when I take the radio out. I've been told the radio is kaput but the source is not reliable because of some of the things they have done in the past.