Needle will not move up or down

The bobbin winder shaft could possibly have been left in winding position - Move bobbin winder shaft back fully to left or back to sewing mode.

The clutch in the hand wheel may have been left out of gear after bobbin winding  - check clutch and if necessary re-tighten.

The buttonhole lever was not lowered when machine was placed in buttonhole mode - Lower buttonhole lever.

Presser foot maybe in up position, a lot of modern machines will not work untill presser foot is lowered - check and lower foot.

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