[incrediboy729]

That is what it sounds like to me also. Even if the gears were turning, in semi they would still get shut off after 1 cycle, not keep spinning. So most likely the gears are not moving, and it is something with your motor height. You can try taking out the 2 screws (not the one in the middle) and that will get your motor out. Idk how if this will void your warranty though. It is a very simple process however.
Either motor height or a stripped gear (other than the sector gear). That would cause the grinding and the fact that it just keeps going in semi. Those are the 2 most possible problems

Or of course a bb is jammed resulting in the nozzle and tapplet plate not being able to move, and maybe that stripped a gear? Even then, the tapplet plate should snap, not the gears. Or maybe a piece of that broken plate got stuck in the gears.
Did you have any feeding issues before this happened (as in pulling the trigger and the gun making a cycle, but no bb comes out)?