Several things can keep your machine from turning. Thread can be jammed in the hook area, around the shaft by the hand wheel as well as near the take up lever. It is also possible you can have the machine in bobbin wind mode. That would be the first place to check. Start with removing the bobbin then the bobbin case or bobbin basket. Try to move the hand wheel back and forth as you do this. Then remove the cover that holds the hook in place. Remove the hook if this does not fix your machine you may need to take it in for service.
Answers & Comments
Several things can keep your machine from turning. Thread can be jammed in the hook area, around the shaft by the hand wheel as well as near the take up lever. It is also possible you can have the machine in bobbin wind mode. That would be the first place to check.
Start with removing the bobbin then the bobbin case or bobbin basket.
Try to move the hand wheel back and forth as you do this. Then remove the cover that holds the hook in place. Remove the hook if this does not fix your machine you may need to take it in for service.