After the ARM stable update on 2021-06-18 my RPI 4 was unable to boot. Inserting the micro SD card and powering it up reveals a solid red and green line on the board, and then nothing happens.
I made a comment in the forum post regarding that same stable update - link - but only now did I had the time to look further into it, and it seems that there is a problem with the image itself that leads to an unbootable system, that has now been fixed (according to a comment in that same thread and a comment on a different thread saying that all RPI images have been rebuilt).
The problem is I would like to keep my system the way it is, and reflashing a different image would erase everything I had done so far. How should I proceed in order to make my RPI 4 boot again without having to completely reinstall and reconfigure everything?
It probably doesn’t make any difference but I have the minimal headless version installed.