Ok i worked out a bit more, i didnt get a chance to get the switch you talked about just went through a few more fuses
Traced it to one of the plug that plug into the headbox, the one with about 10 wires in it. I can plug all the rest in and the headbox background lights all as normal. As soon as i plug the plug in they all dull, only the background lights and if i push the start button it resets and the main motor just continues to turn.
I worked out which wire in that plug made it dull, that went to the credit unit (brown wire white tracer), tracing into the bottom box ( white with red tracer) to the credit relay.
I have stripped the top reel board and of the box and had a real good look over it, can't work it out. I'm sure it's only something simple as it worked well before hand, thought i was careful removing everything but obviously not
