Thanks @Landon_Haugh , I am now able to flash os on SD card.
But ran Into a different error.
I am not able to connect to navq using serial. With the old os on the sd card i have once connected to navq using putty. Then I disconnected all cables and tried again this time i was not able to connect to navq. I flash the latest os the one i mentioned before but still not able to connect to serial.
Would like to know if my board is booting properly. Attaching images of the board.
