board need newer software version

I was trying to run a retropie disk image and when I tried to boot it up I just get told that I need a newer software version related to the boot so I followed a guide were I have to create a new retropie install and copy it’s boot files to the boot files of the non working disk image and everything is working up to when I turn my pi on it’s just on a black screen with a blinking white bar, it’s been like that for like 45 minutes, do I just keep wait or something else?