Demolition Man shooter launch button quit launching ball(s) a few nights ago during a game.
Pressed launch button to launch ball. Nothing..ball sat in shooter lane.

Clipped out the shooter lane coil out of game last night as it appeared that some of the windings were loose and out of the wrapper, indicating to me that a winding may have broke and started to unspool.
Tested the coil out of the game and I do get continuity, so does that mean the coil windings may still be good?

Manual says Q78 is the Shooter driver transistor. I tested the right lug and grounded it with power off and got a .500 reading.

I didn't pull the driver board out yet but thought maybe if that coil was cut out of circuit, it'd be the same as not connected?

I also tested SWITCH EDGES and the launch button switch is working in test mode.

Any advice would be greatly appreciated and HAPPY NEW YEAR!

No it didn't fire in SOLENOID TEST before I cut the coil out.
All the other coils did fire...

Just did. It registers in SWITCH EDGE test when pressed down as thou a ball sitting on it.
The Launch Ball button switch also registers in SWITCH test when pressed.

Thanks for suggestion.

No. Should I put my DVM on the two wires and set it to repeat on solenoid test for BALL LAUNCH and see if it swings to 50VDC?

Thanks for the step by step. Been little busy and will try this tomorrow.

UPDATE: Problem Solved.
Well, once I resoldered the shooter coil back in, I ran another SOLENOID TEST with the shooter rod in the coil and it fired!
I am guessing as much as the coil lugs didn't appear to have a cold joint, it must have.

So all back together and running..

Thanks for all the suggestions.

Update: Auto shooter died again in the middle of a game last night.
Probably only played 5-6 games before this happened again.
Pretty sure it's not a cold solder join this time.
This is the only solenoid that won't fire in SOLENOID TEST.
Ball launch button switch & shooter lane switch works but I noticed that the LAUNCH BUTTON light is out where when it the auto shooter was working, the light would flash under it.
Anything clue in about that?

Update:
Fixed. Inspected coil again. The loose winding issue is that it came off the lug on the backside. Pulled the slack thru the lug hole, wrapped excess around the lug post and re-soldered. No more loose coil wire, fires every time...If it comes loose again, new coil in the budget.