Quoted from Aulantern:Update..All fixed. the 5v volt decided to drop out all together . I managed to find a post re this, ( sorry should of looked harder).
It turned out to be C2 . It was obviously on it way out. I removed it and the track underneath was screwed. Replaced the Cap and ran a wire trace. the machine needs to have a few games run through it but all looks good.
The game starts instantly ..It never used to. there was always a second or two delay.
I am a happy fella
Glad you fixed it and documented it here! : )