Frogteacher, I have the same problem that just started yesterday out of the blue when I was working on a quilt. The "up needle/down needle" won't work. When I press the white button once, the needle just keeps going up and down, until I press it again - then it stops in the up position. I called my APQS rep who suggested I adjust the needle speed - but that did not help. I am planning on calling APQS tech support tomorrow (monday) morning.