okay so our microwave doesnt have much problem cooking food......except for popcorn. lately everytime i have put it into the microwave the popcorn has come out burnt. i tried putting it in for less time still comes out burnt only with less burnt popcorn kernals and more seeds. when it turns on its always made this sort of wierd noise in the motor compartment ever since we got it. it sounds like a sort of rumbling/humming type of noise. this wasnt always a problem but now its gotten louder and after we replaced the revolvoing tray cause the old one broke the popcorn has continued to be burnt. is it time for a new microwave we just got this one less than a year ago for i think it was 500$ not sure.