Regarding the auto power off after keeping the jumper

Follow the guide to flash the SD card and show me the log:

$ sudo ./flash.sh jetson-xavier-nx-devkit internal

https://docs.nvidia.com/jetson/archives/r35.5.0/DeveloperGuide/IN/QuickStart.html
https://developer.nvidia.com/downloads/embedded/l4t/r35_release_v5.0/release/jetson_linux_r35.5.0_aarch64.tbz2
https://developer.nvidia.com/downloads/embedded/l4t/r35_release_v5.0/release/tegra_linux_sample-root-filesystem_r35.5.0_aarch64.tbz2

I was doing through sdk manager and other thing is I was using acer SD card which is nvme.

NY nvme ssd will be like this…

Just do what I told you.
Of course I know what NVMe SSD is…

Okay 👍 I will do it.

Here It was getting like this

Apparently you didn’t do all the steps mentioned here:

$ tar xf ${L4T_RELEASE_PACKAGE}
$ sudo tar xpf ${SAMPLE_FS_PACKAGE} -C Linux_for_Tegra/rootfs/
$ cd Linux_for_Tegra/
$ sudo ./apply_binaries.sh
$ sudo ./tools/l4t_flash_prerequisites.sh

https://docs.nvidia.com/jetson/archives/r35.5.0/DeveloperGuide/IN/QuickStart.html