Checked ISE Disposer unit wasn't hooked to sink but was hooked to power. looked inside and plate didn't move by hand. searched for obstruction in teeth. did not find any thing that would make plate not spin. put socket on plate nut and I did get it to spin some but it was very hard. turned power on and turned on. tripped thermal over load. motor is seized and top bearings grinding when I spun by hand. cost of repair exceeds value of unit. Unit has been down for some time now per Carol. unit is down and needs replaced. we will quote them a new unit installed.