Wow, this may sound strange...but I just had a similar problem w. my machine. IT WOULD NOT BUDGE!! Had it all apart TWICE. I finally turned it upside down and shook it...out can a bobbin from the INSIDE of the machine. It was preventing it from turning. I cant tell you how it got there, bazaar!! I had to take the top off to get to it, still has me baffled. So give it a good shake and see if anything falls out of yours.