Does the switch and solenoid show ok in each test?

I'm not sure what transistor is for that coil, but that is certainly something to check. I would also check for voltage, and broken wires at the coil, before I dove into transistors.

Let us know what you find.

did you check the diode on the coil?

Is the 'C9' you're referring to on the flipper board, or on a different board?

Ok, if you activate the switches in diagnostic test mode, does it change on the display?

I'm sure you have checked that the plunger moves freely in the coil. And so what if you jump power right to the coil, will it fire then?

That's why I wondered about the coil firing with power direct. I just had that happen on one of mine. The coil winding wire broke loose from the lug. Took me half a day to find it, going through all this same stuff.

On my game, I clip a jumper on the ground braid, and quickly touch the other end on the tab on the transistor. The coil should fire.

Yep, just like crash said.

Go gettem!

Because I'm old I can't remember, did you ever check continuity of the wires to the coil from the conectors.

so now you know the coil is good and getting power from the driver. what tells it to fire and when?

It's a f*****g miracle! lol.