That is exactly the same issue I was having with my board.

http://aussiepinball.com/index.php?topic=14122.0

Pascal believes it's either a diode or transistor on the board that is the problem.  You should have got a spare one of each of those with the board.

Check the driver transistor Q1 on the board (just above A3J2).  Also check the diode just below Q1.

I still haven't fixed mine.  I tried desoldering the diode to start with and simply cannot get it out.  I think the fact I have a $15-20 dick smith soldering iron might be part of the problem.    I don't think it's getting hot enough.

So Im still waiting for a mate to come round with his Hollywood version and will try again then, since I don't want to screw up a nice new board.   I might have to finally upgrade to a decent one myself.

Hey thanks Slash, It is what I have been suspecting and you have pointed me in the right direction. I see I have a transistor in the spare bits that came with the board but I would like to get a few spares so does any one know what rating/type they are so I can ask for them at Jaycar?

Dan already knows what I can do to a board so I might take him up on his offer 

Thanks heaps for the reply and pointing me to your post.

Cheers: Brettski... :)