I have a denon DCD-625 and it has suddenly stopped reading some CD's. Even a new box set I got for Xmas - reads 1st one but not other two.

Hopefully it's just a bit of dust on the lens. Or something inside the unit that is obstructing the mechanism, such as dirt.

use a laser lens cleaning dvd

From Denon only.

A Laser Lens malfunction will cause this to happen and is a common problem. This can be fixed at home if a new Laser Lens or Laser Lens w/ transport can be found for your unit. I used ebay to purchase a new Laser Lens for my Denon DVD 5900. The part is also sometimes available from parts stores like Parts Express for a premium, $100+ Parts Express vs $17 ebay in my case. I would recommend purchasing a FACTORY SERVICE MANUAL from an online vendor. The manual will cost between $10 - $20 and is downloadable. The installation is very straight forward. The part that might not be clear would be the grounding shorts on the new Laser Lens. THE NEW LENS COMES SHORTED AND AFTER THE PART IS INSTALLED IN THE PLAYER THE GROUND SHORTS MUST BE UNSOLDERD FOR IT TO WORK CORECTLY. The part comes this way to protect the Laser from static shock damage.
The repair on a Denon DVD 5900 cost $30 and took about an hour to complete.

http://cgi.ebay.com/KSS-151A-Laser-lens-AIWA-DENON-TEAC-WADIA-SONY-/270718926441?pt=LH_DefaultDomain_0&hash=item3f081afe69

$166 delivered

get a new one problem solved

it's most likely the belt that drives the cd tray has perished over time and certainly if you tilt the player to help it, that's just gravity giving it a push. replace the belt and all should be ok. hope this helps?

Hi...

I would say "belt" 1st too.

http://www.encompassparts.com/models/?DENDCD620

Belt is there.

This has to do with a mini switch inside the door mechanism that it pushes once but with the bounce phainomenon in electric pulses it thinks that you pushed the cd door inside manualy and it tries to close the door. Try replacing this mini switch. this will solve your problem.