Bruce, This is PS-32 so it is tested on a PS-2 fixture.
Not much a schematic will help on this type of issue. I would carefully remove bracket and pull top board off bottom and inspect 8 pin and 40 pin header ensuring no bent pins. Reassemble and push in place. Readd bracket ensuring it latches and try again. If still nothing, I would try to address it with DCS loader and see if you can read the serial data or load a sound file. If not recognized there is a board problem.
I will say this, if your test setup has exposed wires and you some how allow AC current to get onto the DC + or - side via shorting a smoke unit fan, speaker lead, etc... You can toast the electronics pretty fast. G
