Need some help brainstorming what the problem might be in this 1960 wood rail World Beauties. It plays fine except when the special is lit. If that light comes on during a game, then it won’t restart. Instead it takes all the credits trying to reset the relay bank in the back. What’s really weird is that it only does this when the playfield is down. We can’t recreate this when it’s propped up (with or without balls in the trough). During normal gameplay without a lit special, it works fine. If you earn a special and it starts complaining, all you have to do is lift the playfield and it stops.
We know it's not one beauty causing the problem because we can only create the issue when all of them are tripped. We also know it's NOT that the bank is too challenging to reset with all the relays tripped because the coil is not firing at all that we can see.
Another theory is that a switch somewhere might be closing when we lift the machine. However, it looks like most switches are not positioned for that scenario to occur.
Anyone have advice for this special problem? I'll try to post a video from my phone too.