Quoted from Vince460:Being a dunce, someone send me the link to the JP specific forum?! Thanks
https://pinside.com/pinball/forum/topic/jurassic-park-club
Quoted from newovad:This has happened to a lot of folks and, recently, to myself. You need to check the wires inside the gray tubing that runs from the T-rex coil under and around the collar on the playfield. My black wire was split in half. So, Rex could close her jaws in the upright position because the wires were touching. When she would bend down, the wires were not connected, so no more jaw action.
Folks on here have suggested just replacing both wires all the way from the coil to the underside of the playfield where it connects. That's the best course of action if you can't find an obvious split. Plus, if you do both, less worry for down the road.