OP

Quoted from Underspin:

My Tron was delivered Tuesday. I was excited to play, went at it and immediately noticed a problem. The "arcade scoop" wasn't registering every time. The ball would drop in and either stay there or get kicked out immediately. If the Light Cycle multi or Quorra multi was ready and the ball dropped in I got nothing but a spit out. My great day suddenly turned sour.
I looked underneath and everything was fine to my eye. Nothing was bent, the V-shaped lever moved freely etc. I assumed it was a software error and went to the Stern website to see if there was an update. Not a chance considering the thing was built a week before.
I took another look at that microswitch underneath. It looked fine to me but noticed that all the other microswitches on the machine had the lever set to the back position. There are two "nubs" as I call them that the lever can snap into, a front and back position. The arcade scoop's microswitch was set to the front position. I took the unit apart and set the lever to the back position. Fingers crossed...turned the machine on and played. Not one problem now everything plays great.
So to blame Stern or not. I'm saying not. I'm sure the machine passed inspection. They turned it on and played a ball, maybe the ball went into the scoop maybe it didn't. Even if it did it registered something I'm sure. The thing is that I know a little about pinballs but the average casual buyer would have freaked out, called the company, called Stern, had someone out to troubleshoot, or had the machine replaced.
Anyway if you're reading this Stern, don't sweat it. I love the machine...my first NIB!