I got the machine last year for my birthday in March from my boyfriend Brian. It is from Costco, The make is Singer and model numer is 4166. You can not disable the start stop button you just use the foot pedal to sew instead. I have taken the bobin area all appart and cleaned it, I have not oiled it lately. Maybe it got tired of me using it for the 2 hours straight. lol! I don't have anything magnetic aroung my machine just metal which are my sewing scisors. I have looked on the Singer website and they don't even have my machine on it, nothing in the forums either. I will try calling the 800 number tonight. I have been so stressed out with this that I have been sick with a migraine ever since. :( Thanks everyone for all your wounderful replys.