Hello.
Sorry, it was all my fault.
I did used 5V/10A DC power source which were VERY good at all times.
But it was good. Basically, when i did watched non-quiet log, i did saw that Jetson were stopped at some strange place, right in initialization.
So, i did used 5V/45A power source to check and it all worked.
I am very sorry for this small but big problem for me.
Alas, i did found, that modifying “quiet” in extlinux.conf is not always answer. I did erased “quiet” in extlinux.conf.backup and then got full log.
Thank you for patience and sorry again. Feel myself very ashamed that not checked it before. So much time is lost.