Hello @yogendrasnaruka,
The Jetson Nano was previously flashed using Nvidia’s tools?. I see you included images of the SDK Manager. Did this flashing process complete successfully?
Do you have access to an UART-to-USB cable? If so, we could use the log to investigate the issue. Depending on your devkit version, you can follow this guide for the connection:
Did u solve the problem, I meet the same problem as you, could you please let me know if you figure it out, and I will update to you once I figure it out.