Continued working on the Black Hole tonight.
Found a problem with relay Q - this activated when you start a game and provides power to the flippers and popbumpers (which didn't work on my game).
The relay just doesn't activate.
When I closed it manually, I got a spark/blue flame at one contact point and fuse F4 blew. Oops..
After trying some things I noticed it was a problem with the popbumpers, the coils just locked on.
Disconnected all the popbumper driver boards. Connected them one by one.. results aren't good :(
Four popbumpers lock on immediately.. Two others don't work at all.
I found 2 popbumper driver boards (untested), put these in but the coil locked on immediately. So either I now have 6 broken popbumper driver boards or something else is wrong..
Tomorrow I'll test the boards in my Haunted House.
Once I know these are ok, I'll investigate further what the problem is with relay Q..
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