Someone had posted that Kia knows about it and it is a software issue. They also said that this happens when you unlock your doors but then dont start the engine within about 15 seconds and this will happen. So I tried that and sure enough it went blank. So then you shut the car off, open the drivers door to kill power to everything, shut the door, lock the door, unlock the door and start within 15 seconds and it worked like it should. I did this like three times and each time the display would not come on if not started after 15 seconds of unlocking the door.
Now I am trying to remember if it was start within 15 seconds of unlock or opening the door? Either way if not started within 15 seconds of opening the door the screen would go blank. I also tested the cruise control and all the safety features with the center display blank, and they all still worked for me.