Found the culprit! 
The conventional wisdom was right, it’s the microwave main interlock microswitch. Seven bucks and I’m back in business, hopefully. Well, and a new faston too. 
The conventional wisdom was right, it’s the microwave main interlock microswitch. Seven bucks and I’m back in business, hopefully. Well, and a new faston too.
You're braver than I. Some things I will disassemble and repair (replaced the belt and seal on an electric dryer a few years ago), but I think I'd shy away from opening a microwave.
Yeah definitely stay away from the high voltage!
Engineer!
I have learned one can repair most things as long as there's an online community for it. My one exception is do not dismantle devices reliant on springs!
Ha! Yeah, that is all too often a one-way disassembly
You don't wanna mess with garage-door openers!
That’s a death wish … messing with those springs, anyway