Hello brentr,
I downloaded the image from the official website, right from Rock Pi S:
https://www.armbian.com/rockpi-s/
Initially and in the most stable version possible I had the noble server CLI version installed, but as it failed and I couldn't get it to boot again, I performed clean installations of both systems, both Debian Bookworm and Ubuntu Noble and in both cases the same failure occurs, after performing an apt upgrade from a clean installation and executing a reboot, it bricks and doesn't boot.
From the desperation of these days... I even tried Trixie and Oracular thinking that a more recent version could solve the problem, and directly these images don't work, they didn't boot either.
Thinking it might be a problem with the recent u-boot tool updates, I repeated this whole process, installing it on the eMMC, with the same result.
The feeling is that some base package has been touched, corrupting the installation. I'd like to provide the logs for further help, but as I mentioned, I don't have a TTL serial cable handy to debug, so I'll have to have one.
So I found myself in a loop with no way out, so I appreciate the quick response to solve this problem.
Thanks.