I had a Creality 4.2.7 main board that said Ender-3 Pro firmware version 1.0.1. I flashed "Ender-3- Marlin2.0.1 - V0.0.6 - TMC2225.bin" and it worked. But then I wanted to get a more recent version.

I found a 1.2.1 version and flashed it but none of the motors worked. Then I saw that I had accidentally used firmware for the 4.2.2 mainboard and not 4.2.7!

I tried to go back to "Ender-3- Marlin2.0.1 - V0.0.6 - TMC2225.bin", but when I powered it on the screen stayed blank. Now it's always a blank blue screen and won't take any new firmware. Have I completely ruined this board, or is there a way to get it back alive?