:-)From your prior thread on Blue Chip "I still get 5000 points, the minimum bonus, lit at the start of a ball," I also own blue chip and this is it's correct functioning. Reading this thread I will say that my instruction card indicates free ball at 2 scores and awards properly upon achieving the lower score but does not at the next score. I have not tried to fix this but is probably just a jumper setting.
BTW I have the original schematic and manual, should you need a reference.