Help! Replaces Diode,Capacitor,Magnetron and fuse...still not working correctly...

My microwave was making a really loud humming noise…I replaced the diode and it was still making the noise …I replaced the capacitor and it stop but then had a burning smell…I could see some burn marks on magnetron where the wires attach and replaced that…turned it on and it blew a fuse…replaced the fuse and ran it for 10 seconds…no humming or burning smell…Yeah it worked…put it all back together …and then put a cup of water in it to make sure it was heating and click blew a fuse again…Please help I am losing it…