The stitch is not sewn correctly

The fabric feeds in the opposite direction.

Cannot thread the needle.

High-pitched sound while sewing

Stitches are skipped

Fabric puckers

Needle breaks.

Upper thread breaks.

Bobbin thread breaks

A broken needle has fallen into the machine.

The needle contacts the needle plate.

Tangled thread on wrong side of fabric

Fabric is caught in the machine and cannot be removed

Upper thread tightened up