Problem connecting my Chromebook to Yamaha Receiver


Hi folks. I am trying to connect my Google Chromebook to my Yamaha Receiver via HDMI Cables to listen to Internet Music. My TV is also connected to the Receiver.
I have the #4 HDMI Plug empty on my Receiver, so I am using that Plug and set my Receiver to #4. I see there are 4 Plugs the size of the HDMI Plug on my Chromebook. However, I only find one that fits the HDMI Plug Cord.
After I connect both, about every 20 seconds, the music goes off for a second. Am I not setting something right? Any help would be appreciated.
Thanks, ptfitzy