Denon AVR 65 question

Through some trading, etc., I got a Denon AVR65 that I've really not used that much.
I was thinking of selling it so I hooked it up to some other equipment to verify it worked ok.
For some reason I'm not getting any sound either in the speakers or the headphones.
Right now I can't find the remote and I was wondering if there might be a setting on the remote that is not available on the face of the unit. A mute or something like that. Something that is set and I can't change without the remote.

Any ideas? Any help would be appreciated.