Arcing and bang noise

The magnetron is arcing and breaking down.

Could be arcing around HV transformer or even an HV wire, Sometimes an insulator on a capacitor will get old, dusty or breakdown and arc between the terminals. Have you ran this with the cover off to see if you can see any visual arcing??? If it cooks sure sounds like it is probably not the mag. Something supplying power to the mag arcing to ground I would expect.

Check your waveguide cover / spatter shield for grease or food particles. It may be arcing.

To help you further (with free advice), I would need to full model number and FCC ID number from the label on / in your microwave.

Contact me directly here.*

* FixYa doesn't always notify us Experts when you follow up online

This louder, 60 cycle hum is usually caused by a bad magnetron. The unit will not heat when this happens. Repair cost can exceed $100.

A wild guess: the scraping noise was a motor bearing seizing up (fan or turntable). A thermal cutout blew when something overheated. This would have taken several minutes to happen.

Alternate, and more likely explanation: the scraping noise was actually high-voltage arcing in a failed component, most probably the voltage doubler capacitor. This would blow the fuse. Replace both the capacitor and diode; the diode was probably overloaded and could fail at any time if it hasn't already. At $5-$10, it's cheap insurance against having to fix the thing twice.

Hi, Sorry to tell you but Dont use this again you need to buy a new one or second hand one. Please leave me feed back: Malcolm Campbell, Thanks.

Two weeks? This is a warranty problem. The buzzing noise was probably either from high-voltage arcing or an overloaded transformer trying to drive a shorted component. The smell is from something electrical getting fried. Remember it; the next time you smell it, you'll know to pull the plug.

Replace the magnetron and the wave guide.

its the problem of voltage the electriccurrent.call a electrician and get the electricity power checked of your place.the oven is getting required current so this problem is coming.

Carla, Sorry to read of your troubles. Your unit that is only 2monts old should be under warranty, or did you receive any warranty?
What you describe as " the noise one gets when metal is put in by mistake". The noise is Arcing of Microwave Energy. Do not operate a Microwave Oven DRY (without something inside that will absorb the Microwave Energy. A Dry-Run Microwave Oven will feed-back upon itself and do damage.

If your unit is matched to the electric needs, both voltage and cycles, then I would not get another one of the same Model.