Small Appliance Repair Questions? Ask a Technician ASAP
Hi, I'm Pete. Welcome to JustAnswer! I'm reviewing your question now, and will post back with your reply ASAP.
First, give all the gears a good cleaning. Then you should be able to select each stitch and needle position one at a time and watch to see what happens to the needle - it should allow you to zigzag again.
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Can you turn the handwheel?
Does the handwheel feel stiff?
Does the needle move as you turn the handwheel?
Does the machine make any zigzag or pattern stitches at all, or do you only get a completely straight line?
Have you tried replacing the needle?
Also try removing the bobbin and re-bobbin the machine and make sure it is well-seated - let me know if any of that helps?