HA crashed after one week and won't boot anymore

I’ve installed the HAOS on a new ODRIOD N2+. The install was easy and done within minutes. But after latest update (not immediately, but in the night) HA crashed (not even pingable). No hardreset solved the problem.
So I made a compleatly new install (Started from scratch). But HA won’t start anymore. So I installd a other OS (Android 11) on my Odroid witch runs without any problem. So tha hardware seams to be ok.

If I start HAOS with a monitor attached, the monitor stays black. The led from the networkinterface looks ok for 2-3 seconds, the complitly turn off and on again … all night long.

Has anyone ani hint what I can try …

I was not able to solve the problem. Bought a new HA Blue …