Crumar Orchestrator Brass Sound Not Working

I have a Crumar Orchestrator and the brass sound does not work. Does anyone know what component I can buy that can fix this problem? Any help would be greatly appreciated, thanks!

Unfortunately, there could be any number of things that are causing the problem. There’s not a way to diagnose it without getting in there and testing and measuring and circuit tracing.

Hi, one problem could be the slider for the brass , if has no continuity no sound at all, have a same problem on mine with the cello , still don’t have the replacement part so if I push the slider knob sideways it’s working, right know I have a piece of rubber under the slider knob , try to move your slider up and down multiple times and also pushing left and right