Microwave stopped heating

Question

Microwave stopped heating after being cleaned (could be co-incidence).

Besides not heating appeared to run properly.

Let sit for a day hoping something was wet and would dry, tried heating glass of water and heard a pop microwave and microwave completely off.

Opened up unit and found 20A fuse blown.

I am hoping by describing the events leading to fuse being blown that part that needs to be replaced is more readily identifiable (fuse & HV cap or HV rectifier or transformer or magnetron)

Thanks

MikeG