I had my Peavey Tour 450 drop off my cabs a while back. No sound out of it. I finally opened it up today and I can't see anything physically wrong with it...nothing loose, nothing cracked, broken, etc. It powers up and the power light comes on (along with the fan), but then it appears to shut down (power light goes out, yet the fan still runs). Anybody have any suggestions as to what to look for? If I could fix it or get it fixed cheap I could always just use it for a spare practice amp. On a side note, there is no preamp out on this head and I already have a new amphead, but I'm thinking of going the Preamp/Power Amp route sometime. Is there a way to use this head as a preamp only (as in gut everything out of it not needed to power speakers and only leave the components required inside to use as a preamp sans the extra weight)? Not sure what that would entail or if it's even possible. Just a passing thought.