Ive had the same sort of problem with the play button on one of my denons, I spoke to a local electronics shop and they said it's probably the tack switch(whatever that is!), and that it should be a pretty simple repair. Hope this helps.

Hi. I've recently discovered the greatness that is Dubstep. So just wanted to say hi to everyone and if anyone wants to hit me with any recommended listenin please feel free.
Cheers Greg.