TV turns off then on since new receiver

[AHorseNamedDan]

Hi, I recently purchased a Denon AVRX4300H reciever. I love it, however, since hooking everything up my tv has begun to periodically turn itself off then on. It happens maybe once or twice in 3 or 4 hours of watching. 
My tv is a Samsung 65" smart tv...about 4 years old. Hooked up to the receiver I have: Apple Tv (off most of the time), Amazon Fire TV, ViewTV AT-300 digital converter, the Samsung, and 5.1 speakers (wireless woofer).

This never happened previously when I had the Fire TV and AT-300 connected to the TV, so it must be some setting with the receiever, or some issue with connections.
Any guidance would be greatly appreciated. Thanks!

[mansr]

It's probably something to do with CEC, the protocol that lets HDMI devices turn the TV on/off and switch inputs. If you're not using this feature, I'd suggest disabling it in the settings for either or both of the TV and the AVR. If you're lucky, some combination of settings will even allow it to work as intended.