I have been having terrible problems the past few days with the PE770, which is about 6 weeks old give or take. All of a sudden it locks up with an error code to check and rethread the upper thread. I can't figure out why. I have in fact threaded, rethreaded over and over, used different threads (all my thread is from thread art sets or 2-3 spools of coats and clark from Joann.) These are project files I have done before in some cases, today I did one that I have done 6 time previously. The issue seems to be exclusively on the satin-stitch steps, and will sometimes happen after several linear inches successfully run, sometimes it will happen 2-3 times in a 1/2 inch. It is incredibly frustrating since it means I am reseting the project many times and there tend to be little flubs in the satin stitch where it started and stopped. The thread does not break, though in the past 3 days I have broken 2 needles, also seemingly random. The brother website is decidedly unhelpful, only suggesting that I check the thread and rethread, pretty much the same info the little 2in screen gave me.
Any ideas? There is evidently a brother dealer/service place not too far from here so I can take it in if I need to, but I am hoping there is a quick fix.