KitchenAid KP50 Professional 5 mixer will not turn on.

KitchenAid KP50 Professional 5 mixer will not come on at all. When it was put away several years ago, it was reported to turn slowly, making odd noises, so i assumed a gear problem. I pulled the lower gear assembly, cleaned out the tons of packed grease, and looked the gears over, everything turns smoothly, and the gears appeared nearly new. Re-assembling, I tries the mixer, and nothing happened at all. All the wiring appears ok, with good connections. Bad motor?