Any ideas? Coliseum 880 issues.

[Bob_brinkman]

I bought an 880 that had the ground pulled out of the plug. It was shocking me occasionally so I decided to put a replacement plug on.   

I then opened it up to get some screws out that were rattling around and decided to spray it out with canned air.  It now turns on but I get no sound.  I am taking it in to the shop but can anyone give me any ideas on what I screwed up?   

Feeling like a moron big time on this one.   

[Bob_brinkman]

Turns out it was blown fuses.  Those screws that weren't in place any more allowed a board to get to close to something.  It was just dumb luck that I blew them when I plugged it in with the lid off to make sure it would fire up.