Thanks flex,
Yeah that is where I'm at now.
Have been chasing wires and checking connectors from the start switch to the cpu board.
Actually found 2 connectors in the wrong position on the board. Not sure how or why the machine ran. Changed them back to spec position and it made absolutely no change.
Tomorrow afternoons job is to try and track the 2 start switch wires from the start switch to board and look for any breaks or cuts in the wire.
I've tried gentle and rough playing techniques and neither result in any pattern of error - somewhat frustrating
!
Thanks Trent