CN2 and CN3 looked pins looked fine but I reflowed them anyway. I also noticed that the ribbon cable from This board to the back of the DMD had come loose on the DMD side. I may have done that while removing the sound board, don't really know. Anyway what ever I did seems to have worked....for the moment anyway.
I've had the machine on for the past couple of hours without issue and played it on and off so fingers crossed all is now good.