Overall, first start by resetting your Maytag microwave, then check that the wall outlet is working. Reset your Maytag microwave by unplugging it at the wall, and then plug it back in. Plug another device into the same wall outlet to test it, or move your microwave to another wall outlet.
If the door has been closed for 5 minutes or longer it will not start until the door is open and closed again. This is a safety feature that stops the microwave from being started with no food or drink in it. Also, the control lock, or the countdown timer can be active which needs to be cleared.