回答“Can I repair my - noisy but cold - microwave oven?”The economics really don't work out for the average standard everyday $100 consumer counter top models. The only way it does is DIY. Salvaged magnetrons from scratch and dents or working machines that failed in another manner or units that were removed/replaced during remodel are available from some small appliance dealers for $10-$30. For commercial units or over the range models that cost a lot more to purchase the economics can work out. New magnetrons can be purchased for most consumer models for $40 - $50. A lot of the postings here are people inquiring about OTR microwaves. Other situations where people repair is if they have an odd size / built in or top of the line (maybe + convection oven) models.
回答“Can I repair my - noisy but cold - microwave oven?”Wow, the ignorance expressed here is astounding. I can see why "people" are warned away from repairing their microwave. A magnetron is not "radioactive", it emits nothing when not powered and it emits radio waves when powered, it is basically a form of "radio tube" and most emit the same freq. as your old cordless phone and wifi router, just a lot more energy, thus why a microwave can interfere with your old cordless phone or wifi. There is no "nasty radiation". The only danger in a microwave is the HV capacitor which can kill you so learn how to safely discharge one, it is not hard if you have half a clue. All the ones I have ever dealt with self-discharged as designed but don't bet your life on it. When replacing any component inside make sure to route all wires as you found them. When replacing the magnetron (most can be purchased new for $30-$50) be sure the gasket (usually inc. with a new mag.) is in perfect shape and in place and that the mounting tabs/area is undamaged. If the mag. mount/area and...