Well, not my main amp, but...
My main amp is way too loud for our house. I have an old small solid state practice amp that sounds like shit through the stock speaker, but really good through the 2 12s in the big amp so I decided to mod it into a 10w head. Everything worked great until I got it all closed up and powered it on -- then it was just a loud hum and it started to smell hot. Turned it off and opened it back up, but didn't see anything obviously damaged. Last I tested it was before I soldered the output leads to the speaker jack and I noticed I accidentally used a shorting jack so my assumption is that blew it. Fuse looks and tests ok, so what else could/should I be looking at? Blown mosfet? I do also see one of the large caps near the transformer with a slight bulge -- could a short do that?
In the end the project isn't really worth spending that much time on, but I figure it's good experience. Thanks, duders.