This has been such a mess all around.
One of the reasons that attempting to hop on board with any new technology in early days is that standards have often not been fully nailed down yet, and there is massive incompatibility between various competing formats and standards- anyone remember the HD DVD and Blu Ray war? And right now, something like this seems to be happening for a lot of PS4 Pro owners, where the 4K product that they have bought does not work with the 4KTV that they own.
Why? Because apparently, there’s no agreement on what HDMI ports should support 4K resolutions. The PS4 Pro will simply not output 4K resolutions to TVs that don’t have an HDMI 2.0 port- which is a bit of a problem, because a lot, probably even most, 4KTVs currently on the market have HDMI 1.4 ports. The PS4 Pro actually did support these older ports until firmware 4.05, when support was dropped for some reason, reports WCCFTech.
Sony have so far made no official word or statement yet, so it’s hard to know whether the removal of support was deliberate or an unintended bug or glitch. But in the meanwhile, if you own a PS4 Pro and a 4KTV, chances are you can’t even use the two together like you may have intended to. What a mess this has all been.