Microwave Repair

I don’t recommend it for obvious security reasons, but I have brought several “dead” microwave come back to life, taking them apart and putting them back together, cleaning all the contacts and microcomputer I had to face, and replacement of any domestic popped fuses and melt connectors.

I have a microwave oven that seems strange to make noise at a time when magnetron may be included. For example, if I just start to cook normal cycle, noise occurs at the beginning.

I have the Sylvania microwave in my RV and fogs, and has many condensation when it used.I’ve read elsewhere that this is not normal. Maybe, just Sylvania has a unique design that other producers do not have?