Fixed-Whirlpool Microwave Not heating / Part2

[@flamaest]

Hello there, the magnetron arrived and I have installed it along with a new capacitor into my microwave. My microwave had a very loud buzzing which was diagnosed to having to replace the capacitor and magnetron... I plugged everything in exactly as it was, taking pictures along the way. the microwave turns on okay now, but when I try to microwave something it just beeps at me... Was wondering if I might trouble you to do some quick troubleshooting?

[@giftedhandsappliancerepair8467]

Of course, when you say your microwave beeps when you press start, Is it beeping like you don't have the door closed? Try pressing start with the door closed and open and see if you get the same beep sequence. Almost sounds like a wire may have come loose or maybe a wire not plugged in somewhere around the area