I had this happen once with my Brother. I had changed my foot and it did the same thing. It turned out that the foot opening did not line up correctly with the needle and as a safety feature it stopped the needle from coming down and hitting the foot metal. If I moved over the needle position to the left, it would then have a clear path to come down and then engage. Is it possible you moved your needle position over too far for your foot opening by accident. Just something else to consider.
Last edited by Schill93; 12-16-2018 at 11:24 PM.