Hi, I've tried out various things, some of which were suggested by some on this list (thanks!). I'm still not able to conclusively discover the cause. Some new information: If I take the lid, when completely closed, and push it with a lot of force to the right (while facing the keyboard) it either reduces or eliminates the buzz. I can't imagine that I am able to push it hard enough to bend the rim to reduce any potentially looseness of the soundboard against it, so I checked that the lid was on tight, and it was. The buzz is still coming and going, and has spread to a few other notes along the keyboard. And actually, it sounds more like a snare drum responding to vibration than a buzz. Any further thoughts? Thanks! - John
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