My Bernina 440 just turned 10. No problems until a couple of months ago. I was trying to sew some velcro onto a coffee cup cozy and I threw the time off so had to take it in to be re-timed. The embroidery unit had a bad board from the factory that had to be replaced but had been fine since. My Bernina 910 Electronic has one computer board for the needle up-down. It is 23 years old and going strong.