Dometic microwave no START

Years ago had a microwave that did the same thing. Found it was the microswitch for the door. They used a cheap 1 amp switch that the contacts burned. Replaced it with a 5 amp unit and the microwave is still working today. So that one dollar microswitch killed an expensive microwave.

Could it be just the key pad??

I would tend to take another look to find a 15 amp slo blo fuse.

MEXICOWANDERER wrote:
I would tend to take another look to find a 15 amp slo blo fuse.

Even though the microwave works in a non-useful way?

OP here: guess what? - we bought a spare microwave for $70.

Of course, today the built in OTR works! ARGHHHHHHHhhhhh

When Chinese are tasked with circuit design, standardization goes out the window. I've encountered units that devoted only part of a control circuit to a control circuit fuse. A turntable operated by a control circuit fuse. Keypad lighting with the power fuse. When I had oodles of time and electronics I remade m commercial LG circuit boards using better transistors, higher voltage capacitors using a hot air gun.
I also sealed the board using 3M sealant. The unit is alive and well a hundred feet from cashing tropical Pacific Ocean waves, nine years later.

I wish I had your skills.

The microwave started to NOT work later this afternoon.

I'm guessing that I need to replace the control board but where to find it?

do a search for Microwave Control Board 6871W1A405A

joebedford wrote:
OP here: guess what? - we bought a spare microwave for $70.

Of course, today the built in OTR works! ARGHHHHHHHhhhhh

I always say if you carry a spare the original will never break or fail but this is ridiculous. ;)

OP here:

Well, it's fixed. I finally got around to checking the 3 door switches, but unfortunately (I thought) they were all good. However I noticed the assembly that holds the switches didn't look quite right. The first photo was the assembly as it was when I opened the microwave and the second was with the tab hooked over the notch in the frame. That change moved the top switch 1mm, but IT WORKS! YAY.

It must have been a helluva bump going down the road to shift that tab (yes, we hit some pretty wicked ones) or it was installed that way in the factory in China and the plastic finally bent enough to move the assembly.

I never did find the main fuse, but I'm pretty sure it's good. :)

https://photos.app.goo.gl/qUuFosjxYADSUm166

https://photos.app.goo.gl/Qo71Dv3ji1n6Wsqd9

I don't know why the images don't show up so I put hyperlinks to them instead.