I am having the exact same problem with my Ender 3 Pro. It started three days ago. Printer worked fine for almost a month, but now it is a brick: a brick with a backlit OLED display. It also does not beep when pushing and/or turning the button. Earlier that day, it corrupted its own SD card.
@webguynj kindly post here if you figure something out. I am trying to get support, but no help on that front so far.