Check to see if it was disabled in the adjustments menu.

And also if it was disconnected under the playfield.

And also do a “repeat” solenoid test of the magnet in the service menu (with the coin door closed)

Hold ball by magnet and see if it works

Tell us more about this deal too ha! I was actually on the fence about Shadow until I got mine in a trade early last year...it's become probably my favorite WPC game since then...fantastic grab for a first game!

Look under the playfield and check the switch that activates when the wall is in the down position.

So is the wall up the whole time or does it go down when you hit a ball up there? If it’s registering locks when you hit the wall, the optos are working at least. Start with easier solutions first — disabled? Unplugged? It’s possible it could have burned out the transistor then if those don’t solve it.

You hit a home run with Shadow as your first pin. Congrats!

There is good advice up above in the comments, so I will just give advice that there are many YouTube tutorials that will help you troubleshoot, and here is a good game-specific website:

https://www.pinball.co.uk/pinball-problems/the-shadow-pinball-machine-repair-guide/

Also, check out The Shadow thread on here. It has lots of Shadow owners that can help as well

https://pinside.com/pinball/forum/topic/the-shadow-club

You did very well

3k?! Dang that’s pricing from years ago.. lately seems decent to very nice shadows list 4.5 to 6.5.

Hell yeah, my kinda deal ha. Glad you got it playing, great game! No shame in the selling game, don't let the pinball ethics patrol in your head. It's your game now so do what you want with it! If you end up falling out of love with it (happens to all of us) at some point, move it on for something you like more!

While you’re messing with it here’s a “fix” I made a little quick and dirty on mine as it sometimes wouldn’t pop up the sanctum wall high enough for the locking pin to grab it.
I made a bushing on the pop up arm out of two dry wall plugs, one 8mm and one 10mm. Perfect fit and cost is negligible.
Also congratulations on an absolutely fantastic game. I love mine to death.
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That is the lowest price I have heard of anyone getting in YEARS. Great buy!

It is your game, so there is no need to worry about it if you want to sell...but I wouldn't recommend it. You won't find that price again in this lifetime. I would also consider it a top 10 pin ever made.

You need to remove those two screws on the left that holds the metal plate over the switch. The block box thing with wires attached is the switch. The swingarm just attaches to one end of it. You might be able to put it back on with the switch still attached but probably easier removing it.

As the swingarm moves down, it presses on a little button on the switch which is what triggers the switch. If the swingarm comes off easily, you can bend the ears closer together. Just make sure the switch activates that little button and releases as the wall moves down and up. If this is not working, you can always buy a new switch as they are not expensive.

Nice write up