Here's one for all of you to think on.
My machine had a catastrophic gearbox failure time expander, so I duly bought a new unit. All fitted fine. However, now, when ever I put the board down, it stops working. If I lift the playfield to try and track down the fault, it's fine again. I have removed it all, checked all the connections, checked the new motor, then re-installed it. Put the playfield down VERY gently, then played for one game, then, motor stopped again. I have wiggled every possible wire and checked every connection so many times you wouldn't believe. I would be tearing my hair out, but I don't really have any anyway!
Any suggestions chaps?