For me it was the screw. would not even calibrate correctly.
then turned the screw with a jewelers screwdriver and then it would extend but wouldn't retract (magnet too strong on field).
then turned the screw with a jewelers screwdriver and then it would retract, but wouldn't drop the ball.
Turned the screw clockwise more and now it drops the ball.

However, if I do two straight game tests in a row with real game and ball on magnet, on the second test it will not extend all the way. I just don't see a real world situation where that is going to happen (too much time)even between players so I am indifferent to that test right now.

My point was it was eventually fixed as it gained more power with each test. (unclear in my writing style, maybe)

The last thing was it doesn't test two time in a row, but I don't see that ever happening in the game so as far as I am concerned it works.

You can disable the head in the menu

You need to fix the LED strip on the side panel or the cabinet it has come slightly unglued and is drooping.

https://pinside.com/pinball/forum/topic/heighway-pinball-support-full-throttle-and-alien/page/16#post-4624971