You can find the remotecontrol codes for different brands
of devices from
http://www.hifi-remote.com/ofa/codes-tv.shtml#tv
If none of the codes work more...
Denon, and there doesn't appear to be a button on the remote. I've tried various combinations of turning off and on, and pressing a software problem. I have another Denon (MD35) and the volume control on the actual device doesn't work. As soon as you twist more...
try and put the time in by wat of the volume control it flicks back to the radio/cd and the actual folume goes up. This happens when using the remote and the buttons on the system itself more...