[HerrProctor]

So i had an old friend in town this past weekend, and I guess at some point he drunkenly knocked my stereo amp down on to the floor. He proceeded to complain about how bad my speakers sounded, even though he broke it and didn't tell me, but I digress. Anyways, what its basically doing is this:

The sound sort of fades up and down and every so often the left or right channel will partially cut then come back. This is the best interpretation I have of what it's doing, but I've never really heard anything like it. Some inputs work better than others, some barely produce sound at all. If i plug the inputs into some channels, it plays (crappily) selected on other channels as well as the one it should be set on. I took off the top and things look unbroken, there's no obvious damage. I didn't pay much for the thing, but any advice is much appriciated. If it requires repair I can't do, its in the dumpster.