Nicholas and  to Aussie Pinball

Have you checked the power supply ? The 28V for the coils is off the power supply and daisy chained around the playfield. There is also a fuse.

Have you checked the marvin guide ?

http://www.pinrepair.com/sys37/index.htm

I Agree, check the coil power and read the Marvin guide.
If you have power it may be the transistors on the board or the driver chips.
The Marvin guide tells you how to test these with a multimeter, but be aware that the chips may test ok on the board even if they are faulty, also make sure if you replace the chips that you install them in a socket instead of directly on the board. If the board hasn't had the light matrix resistors replaced with 5W ones yet then it will pay to do them while you have it out of the machine.
Boots