If the disposal is plugged in and doesn’t need to be reset, then you should check the circuit breaker. The breaker could be flipped, which would mean your disposal isn’t getting power. If that’s still not the problem, then either the outlet is dead, the circuit breaker is malfunctioning, or the disposal needs to be replaced. Check the outlet first by plugging something else into it. If the outlet works, try replacing the circuit breaker switch. If that isn’t it either, you have to replace the disposal.
Located in Benton Harbor, Michigan, the American based Whirlpool Corporation is an international manufacturer and marketer of home appliances. Whirlpool markets many different brands, including KitchenAid, Maytag, Jenn-Air, and Amana. Their line of in sink disposers offer an affordable entry level option for homeowners who want to install a garbage disposal in their home.

Garbage disposals first appeared in households in the 1930's and 1940's. These appliances, which are installed under a kitchen sink, can make a cook's life easier by trapping and shredding food waste items, allowing it to pass through the plumbing system. Although these popular appliances make cooking and cleaning much more convenient, they do require regular maintenance to keep them running at optimal performance. When it is time to replace your garbage disposal's blades, you can save time and money by doing it yourself.

Waste disposal units may jam, but can usually be cleared either by forcing the turntable round from above or by turning the motor using a hex-key wrench inserted into the motor shaft from below.[25] Especially hard objects accidentally or deliberately introduced, such as metal cutlery, can damage the waste disposal unit and become damaged themselves, although recent advances, such as swivel impellers, have been made to minimize such damage.[citation needed] More problematic are drain blockages caused by shredded waste that is fibrous, e.g., artichoke leaves, or starchy, e.g., potato peelings.
I'm not what you'd call a handyman, although I've been working to get better at that. I will now at least try a home project before passing on it. So, when our 15-year garbage disposal died I had another opportunity. I determined our old unit to be a Badger 5 1/2 HP (this exact item). I didn't have time to wait for the item to arrive from Amazon so I went to Home Depot and coughed up an extra $20 for the Badger 500 - Home Depot's branded version of this item. They are identical except for the name & sticker.
If your garbage disposal just won’t turn at all, then it’s very likely that the disposal has lost power. Your unit may have blown a circuit, or it could be unplugged. First, check the plug for your garbage disposal to ensure that it’s secure. Next, locate the reset button on the underside of the unit, and push it. If neither of these things fixes the problem, look inside your electrical panel for signs of a tripped circuit.

Garbage Disposal Repair or Replacement