Gday Matthew .. I assume these newer games are the same as the old EM's .. in which case try a 9V battery across the coil .. probably best to disconnect it from the game 1st ?

Rgds
Dave

Thanks for the suggestion Dave, however I am a total n00b so I will need a little more detail than that  How do I try a 9V battery across the coil? Do I run some wires from the coil to the terminals on a 9V battery? And how do I disconnect the coil? 

Matthew