I just unpacked my new to me Hook. It plays well until you hit the Skull hole, once it drops in there, it goes dark with “Slam Tilt” on the display. Game over ball kicks out to the drain and you can start over. Playing it a while longer, making sure not to hit that hole and somewhere in the upper play field it will get a skull and crossbones and tilt, goes to next ball. Any ideas what the issue may on this thing?

Yes it was, so I'm hopeful that its just a stuck switch somewhere.

Thanks for all the replies! I'll get a chance to mess with it today I hope.

Here’s is what I learned in today’s play time. On sw test, manually triggering switches, the one under the traugh for the skull triggered once says not used, triggered twice it says slam tilt. I also found the sw on the right side of the skull, actually all 3 read something different than they should. On first trigger they say one thing, on second they say, token dispenser, 4th coin, and the back one says tilt. So I found the bad switches there too. It’s got a Rottendog mpu/driver board and whatever the one to the right of that is (pn DP5005)
I’ll try to add pics, your going to have to complete the sentence on some of the display pics.

The first pic is the 3 targets that are wired wrong it seems. The first or right one will start a game, the middle adds credits, and third is plumb tilt. The sw in the middle of the skull traugh is the slam tilt, and the one at the kick out hole of the traugh is the ticket dispenser.
Now I watched a video of this game being played, and I could swear it was all normal, right through the game. But It does have newer boards, and there (pictured) is a random grn blue wire from the mpu run all by itself to a wad of zip tied wires near the traugh. Any ideas of where to start corrections?

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I’ve been using the ipd one online. Is it pretty clear in the manual how it should go?