Another suggestion....can u check to see if the bobbin case inserted corrected? Maybe threads aRe jammed in there.
That was what was wrong with mine, had to unscrew plate to check for threads and then take bobbin case out (if it is)
And then clear it out, the hook has to be placed just right and then voila! It worked. They say u should lubicate/oil after so many uses. Hope it gets going soon! Plus needle has to be in right....oh so many possibilities but hang in there..we can try to help u out!