I'm going to go mail a few of you about sending me your dead amps in a moment, but I want to make it clear this is a hit and miss thing. I'm not an electronics guy really, just handy with a soldering iron and technicaly minded. I can build a wireing harnes for a car but a lot of the theory in electronics I never took the time to learn. I'm no substitute for people like that GDL link I sent you. If I solder up twenty more of these amps and none worked I wouldnt be surprised, if I got ten out of twenty I'd be more than content with the success rate. The solder joint failure is common but by far not the only thing that goes wrong with these amps, read that GDL page I linked. Good stuff there.
I'm willing to put some time into it for those who would like to not spend $200 or so on a profesionaly rebuilt amp, but I really suggest you buy a soldering iron, and possibly a lighted magnifying glass, and give it a shot.
Off I go to solder some more.
http://www.google.com/search?hl=en&ie=UTF-8&oe=UTF-8&q=soldering