The microwave went blank without power. Is there a fuse and if so how can I replace it?

time for a new microwave?

If it was run without the fan a thermal protect device was more than likely taken out. Check for that and replace the fan.

Check internal fuse first.

Dead appliance, power on wall outlet.

YOUR SAFETY IS PARAMOUNT!

Attempt this only if you are competent.

If your appliance has absolutely no functions at all, remove it from the mains supply, remove the case and see where the mains lead goes in to the appliance and follow the cable until you find the main fuse.
ONLY USE THE SAME TYPE AND RATING OF FUSE TO REPLACE IT.
The usual cause of this fuse failure is the door switches are contaminated or sticking. Check the door switches before putting power back on to the appliance.
Hope this helps.

The main fuse in the microwave has blown, this usually is caused by a defective door switch.

Hi,

Yes, there is a fuse inside of the microwave...

Here is a tip that will help you to figure out what is wrong with your Microwave Oven....

Basic Microwave Oven Troubleshooting Tips

heatman101

Look for a fuse on the back where the power cord enters. If not, this is the fix

https://www.fixya.com/support/r29874712-repairing_microwave_ovens

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Yes there is.

The main power fuse inside the MW may have been blown from the steam shorting out the circuitry. If so this fuse probably can be replaced. Lowes has replacement fuses.

I too believe that a "protection fuse" was possibly blown. It would need to be found and get replaced. Hopefully it is just a fuse and nothing else because the way it sounds to me, the microwave may be damaged.

Good Luck!