Likely a broken connection on the power winding. Inspect the two ends of the fat wires coming off the coil. If you find one loose, unwrap it a wind if needed, scrape the insulation off the end, then resolder it to the lug.

Since that game has a fliptronics board, the hold coil turns on less than a second after the flipper button is depressed. So that part sounds like it's working as it should: with only the hold coil energized the flipper will typically vibrate slightly and stay up if you lift it up. Sounds like a problem with the power coil wiring or driver circuitry.

Check for voltage at the power winding on the coil. Both sides should have approx. 50 volts when the flipper button is not depressed.

Doh! I meant to say the power winding. I got the fat wires part right anyway. Post edited.

Clean flipper button opto

I have similar result with an Addam's family swamp VUK coil.

Have you gone into diagnostics and run the power test to see if it is signal or actual power circuit? Also, check to see if your eos is making proper contact.

Congrats. When testing voltage the game should be on, when testing continuity/ohms the game should be off.