"Why does the electronic beeper beep and the sewing machine won't sew?"に関する回答Just solved my problem of whirling noises and machine not working. It was where I had wound a bobbin on the top, but the bobbin shaft had not been clicked over correctly , so the bottom of the machine was still switched off.. Simple, but very frustrating, hope this helps someone. Check this out before doing anything else if you hear that noise!