I have a 7 year old GE above the range microwave oven. It is making a weird sound. We think that the Magnetron is going out again because it happened the same when the microwave was 2 years old. Im considering that this is an over the range microwave which is much more expensive, otherwise I would have tossed it long ago. I would like to know what you guys think. Should I repair it again or toss it?