Try cooking an egg to dispel that thought.
Older microwaves had minimum on-time because of the filament warm up
time...and the lack of high voltage power supply electronics back then.
A 10-second on-time is plenty of time for localized heating to cause
food to explode.
The newer inverter microwaves have much shorter on-times so food doesn't
explode as easily even at the same average power.
>>
>>
>> NT
> Darn it! I was gonna try to make some mousse tonight in the microwave.
> Eric
>
Under what conditions did the microwave fail?
Did it quit while in use? Between uses?
Any power outages or lightning storms in between?
I've never fixed a newer microwave. All my repairs were diode
replacements in older machines. I don't think I'd even try
to fix my Panasonic inverter without a full set of schematics.
Even then, all the sensors would be a nightmare to reverse-engineer.
I'm gonna make some guesses.
I doubt that the magnetron has failed.
Sure, it can crack if you overheatd it by running it
for long periods nearly empty.
More likely something else failed.
There's not much to cause instant failure of a magnetron
if you didn't overheat it.
I doubt that there are any high voltage components on
the controller that was replaced.
The oven is full of sensors for safety and cook control.
Any of them can cause the system to inhibit the microwave function.
I'd guess that the only things a controller would monitor
might be power supply voltage and temperature.
Just not worth the expense to do more. But there's plenty
more to go wrong.
Here's some reading material.
https://www.thermex-thermatron.com/wp-content/uploads/2015/11/FailureOfMagnetrons_v3.pdf
https://www.repairfaq.org/sam/micfaq.htm