Most turntables were driven by a belt. The motor shaft had a pulley on it and the turntable had a shaft with a pulley. Since you hear a whirring sound your motor is probably O.K.

Most likely your belt broke. It may be difficult to find a replacement but you can try. I was able to fix mine using a rubber band for a "belt". It has held up a couple years but I seldom use it.

I hope this info helps you.

Norm