I've got a Penrose build from a friend here, which has this little problem... maybe somebody can point us in the right direction to get this fixed.
Basically, the Penrose works fine until you plug in a cable into the TRIGGER IN. Doing this makes it lock up somehow, the first button turns red, the others are green and no incoming voltage is processed. When I unplug the cable again it goes back to working normally.
this behaviour happens also when I just plug a disconnected jack into the TRIGGER IN, which makes me think that there might be a short in the jack socket...
I've checked the components and solder pads... even desoldered most of them... looks all gold to me.
So the question is... what could it be? What could I try?