A:AnswerEasiest way is to download it. If you want an official copy, then contact the manufacture from the information within the only version. https://amana.com/assets//amana/pdfs//USECARE/AMV2307PFS_Use%20and%20Care_EN.pdf
A:AnswerNo, but videos online make it appear it is easy. We had a friend install. The back plate and screw holes on top matched exactly from our previous microwave of a different brand that we had for about 10 years. Seems that most of these items have been standardized.
A:AnswerThat is weird. You will need to ask the manufacturer if still under the warranty. I looked at the documentation with the oven and I don't see how you could have turned it off.