I have owned some "D" products in the past, and still have a few. One of their biggest problems is that I had to send the unit in about once a year for laser alignment. This may be the cause of your problem. I would have the unit serviced, cleaned, & alligned or sooner or later the unit will stop reading
ALL CD's. This was one of the big reasons I became a fan of ADJ/AA CD player fan about 3-4years ago. I went from the Pro-DJ2's, to the PS1, to the PS2s. I only ever had one problem, and that was from a big blue static arc that took out the pitch control on one player (and burned the tip of my finger)
