Quoted from quantumjosh:problem is the lower boat lock switch in the Lauren bell (boat) is temperamental.
Theres a couple spare switches here but since it works sometimes I haven't troubled myself to replace it
I had this problem with my Maverick when I got it.
Was just cold solder on the optos.
Took them out and reflowed the solder and it been working like a champ since, which has been a few years.
Not a hard fix, just time consuming.
Great price for a really fun game.