Some devices (i.e. set-top boxes) will automatically update their software, guides, and settings regularly. When they do, they wake up which causes activity to be seen on their HDMI connection by Control Center.
Control Center has a setting that will allow other activity on other devices to turn it on. To turn this off for all devices, go to Settings> General> Power system on when device activity is detected and disable this setting.
If you do not want to turn off this setting globally, or it is already disabled, check for the following:
- If Control Center keeps waking up to display a particular device, go to Settings> Devices> [device name]> Control Settings> Auto-Switch Settings and disable any "power on" options, if available.
- Check to see if the remote for any of the devices attached to Control Center (TV, AVR, Soundbar, or any other device remote) are in a place where a pet or someone else might accidentally press a button.
- If all of your remotes are stuffed into one spot, such as a pocket or container of some sort, make sure that buttons aren't being pressed accidentally. Don't forget to check inside the couch cushions!
- If you have a second Control Center in your home, going through the setup process on one may randomly wake up other devices on your network.
- If you find that one device keeps waking up the system, you may wish to see if there are any sleep settings that you can modify on that device.