So today my Princeton reverb became just a Princeton. Pretty sure my two year old got into my music room and messed with some stuff. He definitely unplugged it. Plugged it back in and the reverb won't turn on at all. The vibrato side of the footswitch still works fine, and I swapped out the tube. No change. I'm wondering what else I could try before I throw my hands up and take into the shop. Any thoughts?