Amplifier Operational (until I broke it)

I finally plucked up courage to wire up my birthday present today. It is an home-made amplifier with lots of inputs and outputs and no labels or manual for idiots like me.

Bollocks. I think I just broke it. It was happily playing a song and then stopped all of a sudden. Maybe it has a "Shitty Britpop" recognition unit built in? "Pulp? I'm not amplifying that crap". I think I'm going to start to cry :-(