My sewing machine is nuts. It has the buttons that beep when you are in a stitch zone that is not compatible with your needle width....well, it is sewing fine,,but is beeping constsntly,even when I un plug it!!! Any hints what to do?? ( I don't have a "dealer" so that's not an option)...it's nuts!! How can it beep when it's un plugged? Must be a gremlin in there!!