The microwave you had, probably had a blown fuse, the big one near the big transformer.

Thats caused by one of the safety switches arcing shut when the doors opened while the ovens still operating.



Check the micro switches & ones probably not working.

You have to then replace all of the micro switches & the large fuse.

Then it'll work, replacing only one switch will make it work for a while, then a different one will fail.