Belt for model 158.481 zigzag stitch not working?

If the belt for your model 158.481 zigzag stitch machine isn't working, it could be due to wear or damage. Check for any visible frays or breaks in the belt, and ensure it is properly aligned on the pulleys. If the belt is intact, the issue may lie with the motor or the tension settings. Consider consulting the user manual or a professional for further diagnostics and repair options.