So I had this issue. Here’s how I fixed it. (1) Remove power cable (2) remove hdmi cable (3) press and hold power button for 30 seconds (4) plug PlayStation back in to power put a disk in to make the PS4 kick on. (1) plug hdmi cable back in after about a minute to give the PlayStation time to boot up (2) and voila! My PS4 pro is running like before. I have no idea why this is what worked but hey, at least I’m not buying a new console.