The stitch is not sewn correctly

The fabric feeds in the opposite direction.

Cannot thread the needle. (The needle threader cannot be used.)

High-pitched sound while sewing

Stitches are skipped

Fabric puckers

Bobbin thread breaks

Upper thread breaks.

Needle breaks.

Fabric is caught in the machine and cannot be removed

Tangled thread on wrong side of fabric

Upper thread tightened up

The bobbin thread cannot be pulled up.

The machine does not make stitches

A broken needle has fallen into the machine.

The needle contacts the needle plate.