DIETRICH MICROWAVE OVEN DME799X - De Dietrich Microwave Ovens

Possible broken/bent door latch.

Most magnetrons are the same just a different orientation for the fittings.
You require a 1000W type 2M226.
No idea where you are in the World so here's a start for you;
https://www.sos-parts.com/magnetron-2m226-microwave-oven-brandt-de-dietrich-fagor-as0017655-51822.html

Some ovens have a tuning stub in the wave guide. If it has become loose or rusted, it could cause the problem. If that's the cause, you would have to transfer all of the oven's components to a new cavity. This is usually not done due to the cost, although I did do this once on an oven that was still under warranty.

Make sure the wave guide is clean inside.

Also check for rust near the wave guide cover. Re painting damaged areas might help.

Sparks fly, too, if the ovens contents do not contain enough water to absorb enough of the microwave energy. Leftover energy converts itself into electrical current in any conductive material (such as cavity panels).

If you need further help, I’m available over the phone at https://www.6ya.com/expert/david_29ad5d1dd86564b0

This is correct remove the case

Try Retrevo Manuals.com

follow this step and fix it. A power surge or random non-reproducible action of the universe may have resulted in the controller's program ending up in an infinite loop. Pull the plug for a minute or two to reset it.
God bless you

The fuse in the microwave has blown, there are any number of reasons for this, one of the door switches has failed, "common problem" or in some cases just the fuse will go.

Hi,

Here is a tip that will help you to figure out what is wrong with your Microwave Oven....

Basic Microwave Oven Troubleshooting Tips

heatman101

Hi,

Here is a tip that will help you to figure out what is wrong with your Microwave Oven....

Basic Microwave Oven Troubleshooting Tips

heatman101

Usually a shorted high voltage capacitor...see components section