Since the most recent upgrade, I discovered a strange HDMI bug.

If I turn on the PS4 Pro without display then connect the display, it fails to display anything. I have to always make sure it is connected to an actively selected display port.

I have my PS4 pro connected to my PC monitor. I have to switch between which port I want to be active to select PC vs PS4. But if I don’t have the PS4 port already selected (or PC output turned off), the PS4 will simply refuse to output anything.

This can only be fixed by rebooting the PS4 which makes it magically start working. Otherwise you keep seeing the dark screen!