Quoted from Nihonmasa:At this point I’d check the electronic parts that control the motor. It’s getting send 12V or -12V depending on the way it goes.
Try your motor this way:
Find a 12v adapter, remove connector.
Disconnect the motor engine from the connector.
Put (through crocodile plugs or whatever you want) the cables from your adapter to the motor.
Put back down the playfield so that it lies as when you play
If it behaves as it should (meaning going up and down as these are the ibly things you control with this test) when receiving power this way, then I’d say the issue is on the board or logic and not the motor.
If it does not then you received a faulty motor, or your 12V is screwing them up.

Quoted from yellowghost:

Maybe something with the switch that detects the glass. That switch shuts down power to that motor I think

Quoted from Rdoyle1978:

I had a rather similar situation that Faz Helped me out with - the MPF motor shares a power wire with a random flasher in the backboard. I think it’s the flasher behind #5. It can easily come loose from the connector which joins it. The loss of this connection can lead to a low power situation for the motor, where it can’t reliably raise and lower the MPF. Be sure to check on that ..
If u remove the mini playfield and it will raise and lower when powered from a 9 volt battery, but fails in the game, it is probably what I described ^^^

Quoted from pinball_faz:

I'd suggest you pull this into it's own thread. That's the problem with these generic game threads... yes, large audience but really hard to track when several tech discussions running concurrently. As for your issue: lots of good ideas above. Let us know how those tests work. Also, you test the connections but it might be the connectors themselves. Specifically the two wire connector for the motor and the other end of that connector on the bi-directional board. Given your description it sure sounds like a bad connector, broken wire or cold solder joint.
faz

Quoted from eyeamred2u:

Painting Dr. Who coin door and other pieces in Oxford blue. Turned out better than I hoped. Will look better than standard black coin door, in my opinion.
Ken
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