Dino,
Take a close look at the two lid hinges over on the left side of the piano. They are different according to the maker, and I'm not sure what Fazioli's looks like. But here's why I mention it: On my Baldwin the hinges are simple brass L-shaped pins that secure the lid to the rim. Each pin passes through the center of its stationary hinge mechanism, like the much larger pin that is typically inserted into the core of an ordinary door hinge in the home--the exact same principle, except that where a door hinge is mounted vertically, a piano lid hinge is horizontal. My Baldwin pins each have a rubber tip at the end of the short part of the L. The more times I lift the lid, the more the friction of doing so causes the pin to shift inside the hinge, such that eventually the small part of the L with the rubber tip, instead remaining flush with the rim and pointing nearly down toward the floor, twists and becomes horizontal pointing at the wall instead. At that point I get a buzz in the piano! Who knows why. Having figured out what it is, I just get up, press down on both rubber tips to set them flush with the rim again. Like magic, the buzz dutifully disappears every time. This happens once every few months or so. If you have similar lid hinge pins, try doing what I mention here and see if you have a sudden solution to the buzz. Good luck!
Topic: Brand new pianos and tuning