The best suggestion is to try the PGMIII on another known working bike to eliminate the PGM from the equation.
If any of you have PGM trouble be sure to trace the cause of the problem before fitting a new PGM, as they blow rather too easily and if the root of the cause hasn't been cleared up then you'll keep blowing them......very expensive!
Usual causes for a dodgy PGM are water damage causing a short within the PGM, so always be a little careful when washing the bike (no power washers), and the biggest cause of all is wrongly adjusted RC valve cables and dirty RC valves. This overloads the PGM causing failure.
I believe that Andy's got a section of setting the valve cables, and it's worth pulling the pipes off now and again to check the condition of the valves.