I did all steps in the tutorial on the xavier nx and after reboot it seemed to work. The SSD was detected and the SD seemed to be just a normal drive that was plugged in. However, I accidentally (I was to stupid to read that the SD need to be plugged in all the time) removed the SD and reboot. Only black screen, nothing happend, no boot, nothing. I inserted the SD card again, power on, nothing happend, only black screen. I even removed the SSD, flashed a new SD card and inserted it. Nothing is happening, only black screen. It seems that the Xavier NX is dead.
Any suggestions how to fix it??? Appreciate your help.