Topic: Denon DVD-2900 vibrates

Calling on all Denon DVD-2900 owners/past owners.

I picked up one of those units on the weekend and much to my surprise the player vibrates during SACD and DVD playback. The vibrations do not occur during regular CD's playback. Has anyone else experienced vibrations on their machines? Is there a solution to this problem? The player is in mint condition otherwise.
Any advise or suggestions will be greatly appreciated.

Thanks in advance,
_A