Have you checked the wall outlet? And the electrical strip, if you are using one? If they are working, then it really is your machine. Your Bernina probably has an internal fuse and it may be that it has blown and needs to be replaced. A trip to your machine doctor might be all that is needed.
I did think this youtube video was interesting, but I don't think it addresses your problem:
https://www.youtube.com/watch?v=yEYrb38253w