I talked to the representative at Nolting today. His suggestions were
1. Are you sure the presser foot is down? (yes)
2. Do you have a sharp needle? (yup, and put another in today)
3. I suggest you loosen the bobbin tension. (did that till it wouldn't sew, then increased it till it would)
4. Where do you live? (Alabama)
5. We don't have a dealer near you. (I know)
6. I think it needs to be seen. (I have 3 weeks left I can get free shipping for a replacement)
7. I'll see if there is someone going to be in the area that could stop in and check it out. It may be tomorrow before I can get in touch with you again, but I'll be back in touch. (thanks)
So, if I don't hear from them tomorrow, I'll contact Hinterburg again for another replacement.
Sigh.