Unit is completely dead

Sounds like the main fuse blew. It's either near where the power cord enters the cabinet, or behind the control panel (if an over the range unit).

You may also have some type of failure in the high voltage circuit; based on your description of the symptoms.

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Blown fuse inside of unit. Must find out why fuse blew, something shorted or bad connections.

you cant do much about this.. the only thing you can do is check if the power is going to the magnetron unit or not.
but i wouldnt suggest you to experiment with the unit as it can cause short circuits.
you should rather go find a cheap electrician

It'll be the main fuse on the inside.

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Hi,

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In situtions such as these it can be considered that the Magnatron has passed on. Co0t of repair often exceeds the value of replacement.
No fuse controls the magnatron separately from the rest of the unit so deem it dead

With the availability of good second hand models on the market via pawn shops like Cash Converters etc one can find a very good unit with 30 day warranty for $50-100 and its already been checked over for defects

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sorry but yes its time to replace it,
oh,, by the way,,,
your very lucky to still be alive right now!!!
tinkering inside of a microwave could kill you,,,
inside of your microwave is a very big capacitor it works just like a police stun gun works,,,however it dont just stun you,,,it kills you! witch would realy spoil your day, be warned, many a fool has took a free flying losson from one of them but servived just!

There is an internal fuse inside. Need to find the cause for it blowing or it will just go again. Check the monitor switch and door switches. Eric

Is it on a gfci plug? If it is reset that. If not I would recheck the circuit breaker again

Fan turned on after cooking because a thermostat got to hot and tripped turning on the fan to try to cool the unit.  The unit went completely dead when thermal fuse tripped which is located above the cavity on the left side.