Newly aquired Jetson Orin NX will not boot up on inital setup

Community General Info - Guidance
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Please some one help me.
I flashed my jetson Orin Nx.
now when I boot the board:

  • I see the NVIDIA logo for a second
  • Then it quickly moves to a black screen with a blinking cursor (no login prompt, no GUI)
  • Sometimes it briefly shows an error about failing to mount something, but I can’t read it in time
  • After that, it stays stuck on the black screen

I already tried:

:heavy_check_mark: Editing the extlinux.conf and setting:
APPEND root=/dev/nvme0n1p1 rw rootwait quie