Christof helped me out while Dan is recovering from COVID. For anyone else facing this issue, you'll need to manually reflash the ESP with a programmer. I used a Sparkfun Beefy 3 but it requires modifications outlined in the documentation here: https://psx.i74.de/man-flash/
I recently tried to update my PS1Digitals firmware using "cleanup" then "check" via the web interface. I receive an odd checksum error, so I stopped trying to update the firmware and turned off the PS1. Unfortunately, when I power the console back on, I now see a "Firmware Reflash" screen with...