I have an older Viking - not the same model as you but here goes. Have you turned the machine off/on again? Unplugged it and left it off for a period of time (hour or so)? Can you turn the handwheel manually when the machine is on? A friend has the Sapphire and had, if I remember correctly, a similar issue. Turning the machine on/off had no impact. She took it to the shop and they simply turned the handwheel manually and resolved the issue! Hope this helps and you don't need to take it for repair!