Video Goes Blank When Switching Devices

If Control Center is connected directly to a TV, make sure the HDMI cable is connected to an input other than HDMI (ARC). Using the HDMI ARC input on a TV may not work well with Control Center.

Some HDMI cables can cause signal issues as well. Try swapping the HDMI cable between Control Center and the source device with one you know works to see if it's your cable that might be the problem.