My blackboard arrived this morning. I put it all together with RPI3 i was using previously with the beta board, flashed 0.7.2 os to sd card, connected my midi keyboard, ran sushi, connected sushi to midi keyboard. set up mda vst3 synth as in docs
but i have no sound on any output. tried volume knob. no light on the blackboard display.
what should i do now?