Well, I picked this thing up the other week with a few other old nudgers, I know it's a long shot but if anyone would have a spare reel glass as its cracked on this one.
On checking the board I though ahh looks clean this one, powering on happy days it reset and I was able to credit the machine and play but no sound, after checking again it turned out it's a mod4 board, after trawling through the posts through the knowledge of the members here It looked as I needed a mod2 board.
Anyway after a while when the machine heated up the solenoids were energizing and chattering turns out the pound one was burnt out completely lol, so got it changed and ordered a chip from France some fellow on Ebay for the sound issue, having a spare mpu4 with the socket in for the Ay-3-8912 I now have sound which is nice.
If anyone would have the switch settings on the mpu4 for the percentage it would be appreciated guys.
Cheers and thanks.