No sound from my brand new speakers

I just bought new speakers and this used Denon avr 2802. I have another 2802 that works great and that's why I bought this one. I'm about 99 percent sure that I've set everything up correctly, doing everything step by step in the manual. The problem is I can't get any sound at all to come out of my speakers, not even a hum that would show that they are receiving something from the receiver. I've tried using different inputs, trying the FM tuner, and even using the speaker set up tool that usually produces a static noise that comes straight from the receiver, and I still can't get a peep from the speakers. Is something wrong with the receiver that would make it not output any sound to the speakers? Any help or advice would be great, thank you!