OP Here.
Couple of Items.
1. He checked there was 12v to the control board with a multimeter. 13.2volts (he's plugged in).
2. He's not getting any cooling running on AC - so that was a red herring.
3. He's not getting any spark at all - I had him try the ground. He tried a couple of different ways, but no joy.
4. On both Gas and AC he's getting 4 blinking Power Light every 3 or so seconds. According to the service manual, it's saying it's the control board.
So - if you were going to order a replacement board would you go OEM or Dinosaur for your replacement board?
Have we missed anything on the diagnosis process?