Good deal. I like doing that sort of thing too. Most people say it is not worth spending the time/effort, but I think it is fun to troubleshoot and it is really great when you fix something that was going in the trash. Like you said, if you get stuck, it can still go in the trash, but atleast you tried to save it.
Our neighbors were going to trash a $1k treadmill. Something got killed on the motor control board from a power surge. The called the company who makes it add said $400+labor if it is this board, $600+labor if it is this other board. They figured it wasn't worth it, so they were going to dump it. I haven't had a chance to dig into it yet, but I know it'll be an easy fix.