Sony rebooting when using Apple TV

I have an Apple TV 4K attached to a Sony XBR‑75X900E, both are a couple years old. Every few weeks when starting everything up, the Sony reboots. Once the Sony has fully started again, I can start watching something using my Apple TV, but the Sony robots again after a couple of minutes. About 5 seconds before rebooting, the audio goes off. This rebooting usually continues over and over. What usually seems to stop it is to unplug the power from the Apple TV and plug it back in, but this doesn’t always work.

I’ve tried different HDMI cables and different HDMI inputs on the Sony. It doesn’t seem to matter which app I’m using on the Apple TV. Watching something using one of the Android apps on the Sony or using my MacBook Pro as the video source do not seem to cause the rebooting.

Anyone have any ideas?

Thanks