my denon 2900 appears to have developed an intermittant fault. on occasions (more offen than not) it fails to accept audio cd's. you put the disk in and the machine just spins away trying to figure out what it is, and then finally gives up and says 'no play'. dvdvideos, sacd and DVDA are all fine. has anyone else experienced this ? i guess ill have to get it replaced under warranty Again.