"cranks" to some mean the engine is running, where to others it just means the starter turns the engine over but the engine will not fire up and run.
Yours sounds like the engine will run but just won't go into gear. Clutch not working maybe?
John Deere 820 utility, John Deere 5525, 997 JD Zmower, Komatsu PC 35 miniExcavator
So the engine is running, but no instrument panel. I assume you have a power reverser.
My guess is electrical and it has affected the interlock safety feature on the power reverser.
Check all wire and connections. Mice may have chewed through a wire...