Thats ok Retro. I checked all fuses on power supply board and it looks like one was not connecting properly. I have re-seated them and now system fires up, so you were bang on the money. Now the next step is to find what is shorting out the coils, or which one, as none of them are working. Flippers are working, so your logic is spot on.

How do I find a short in the coils, or how should I test them?