Any advice out there for me RE Denon cd player ? Unit is only 6 months old and has been working fine. Out of the blue, it just does not play a disc. There are a couple of discs in the player from last time it was used and when I turned the unit on, the screen just displays a "ERR" message. No changer sounds at all. No other commands seem to work. The screen read-out does cycle through the disk numbers, but after a few seconds the "ERR" message always appears. Any suggestions appreciated.