SOURCE: Who knows. Multiple possibilities.
SOLUTION: Remove blockage, free up the flywheel.
TOOLS:
TIME: 5-10 min
tl;dr
PROCEDURE:
Take the key that came with the garbage disposal (if it’s ??? brand, you could also use a 9?mm hex. This might be universal). there is a slot in the middle of the bottom of the unit. Turn it until it moves freely.
When you plug it back in. turn it on.
hear nothing? hit reset button. (there’s a little red button on the underside, near where you put the key to rotate the flywheel)
RESOURCES:
https://www.thespruce.com/how-to-repair-a-garbage-disposal-1824890
anatomy diagram