Denon DVD-2910 excessive vibration?

does anyone's player have trouble reading discs? i have had this issue recently -- i put in the disc and it the readout says wrong format. i turn the power off, than on again and it can read the disc.

My 2910 vibrates with sacd's, mostly. It depends on the disc, but I get more vibration as the tracks get higher. Are you going to send yours back? Boy, I'd really like to know if stopping the vibration makes the sound better.

I just called Denon and they are not aware of a vibration problem. I was told to re-initailize the microprocessor by pressing the foward/skip and play buttons together, then while holding them down press the open/close button for about 3 seconds. The word initailize should appear in the display. He said this has worked for unexplained problems. You can also find this information on page 73 of the manual. I will try it tonight and let you know.

I have found with my 2910 that some CDs vibrate while others do not. I have been checking them by putting my hand on the side of the player as the CD spins up. Most DVDs are fine. I have not noticed degradation in the sound or video quality. I believe the vibration is due to some production discs being off centered or slightly off balance. I copied one of my music CDs with a vibration problem to a blank CD and the copy played flawlessly with no vibration. This same CD by the way caused my computer to vibrate as well. I believe this is also do to the high spin up speed of the player. It exagerates the vibration.

What bloomphoto said really makes sense to me - I have noticed the same exact thing, and the "imbalanced disc" idea crossed my mind, but for some reason I dismissed that. Like I said before, my 2910 seems to do it with sacd's, but I bet that certain other discs would too. I havn't heard or seen effects from it, but how would I know if there is a problem - maybe I'm just used to hearing the problem.