Mensagem original de: RoggeSound ,
My microwave also started doing this, and simply cleaning the waveguide cover took care of the problem. In my microwave, the waveguide cover is on the inside of the microwave, high on the side wall. It's about the size of a playing card, made of plastic or fiberboard. I removed mine for cleaning, but that wasn't necessary. Simply keeping the inside of your microwave clean may solve this problem.