You nailed it. Yes, there was some shipping damage. So I tightened all the screws, and slightly pushed some of the cables to the side from the sides. This reduced it a lot, and once I added some electrical tape in the lining where the cover touches the base (can't see it from the outside), it took away most vibration and hum, and I can only hear it when I put the ear up close.
Thank you for the help!!!