Connecting Chromecast to a Denon 1312 problems...help?

I apologize if this has been answered elsewhere, but I'm not finding anything. Maybe my brain just hurts or I'm an idiot. I've been using a 1st gen Chromecast in my bedroom since it first came out. I wanted to use it in the living room, but when I plug it into any one of the HDMI inputs on my Denon 1312, I get nothing. I used to use the receiver to run a cable box, Xbox, and Blu-Ray to an old 720p Sanyo (gift from 2009). After cutting cable, I now just have an old PC hooked up to the receiver. I'm curious about whether the Chromecast can completely replace the PC, so I hooked it up, but the TV didn't recognize it. Well, to be specific--if I plug the Chromecast directly into the TV, the TV registers it. But, I've tried all of the ports on the back of the receiver, and nothing. I even used the one port that I absolutely knew worked--the PC.

So: problem is with receiver. I can't determine whether it is a configuration problem on my end, or if it is an incompatibility issue. Any thoughts?

Would this be a good excuse to buy a new Chromecast?

Thanks in advance for the advice--I appreciate it!

Submitted by BeagleBrigade Xbox 720 Release Date 2015