Ditto Ditto Ditto on calling Michael! you will wonder why you waiting so long! Also check out the you tube video by Jamie Wallen. I use my TOWA on occasion, but doing the bobbin case test Jamie shows has saved my bacon many times. I do it every bobbin change now.
https://www.youtube.com/watch?v=Q1mRhcquZTM
I also encourage the Yahoo group. You will find people who 'speak" Innova and have been where you are. Just remember you are learning to troubleshoot your machine! Deep breath and hang in there! (what kind of thread?)