OP

Quoted from rotordave:

Funny yesterday ... I have been fine tuning the LZ for its competition debut next weekend.
I was trying to figure out why the 1000pt spinner light wouldn’t light up. You’d get the bonus wheel around to LIGHT SPINNER, hit the scoop and the 100pt lamp would light, and you’d get 100 a spin. But I thought that the next time you did that, the light would progress to 1000 points. Mucked around with it for ages trying to sort how how it all worked.
Finally - a web search discovered an old Pinside thread - where it said that if you are on 5 ball settings, you can only get 100 a spin ... and if you are on 3 ball settings, you get the 1000 a spin! You can’t have both.
So that mystery was solved!
Next mission is to track down why the backbox GI fuse is blowing randomly. One of the sockets must be dodgy, just have to work out which one ...
rd