Thank you all for your tips. It's good stuff. I was able to locate
the magnet adjustments but clearly there is something wrong with the
electronics. Zanen doesn't appear to offer a kit for this board. It's
an old Vectorbeam monitor from a "Warrior" game. And due to the rarity
and obscurity of this thing I think I'm going to defer to a
professional on this one after all. Thank you all for your help though!