sorry that i annoy you with the same problem too but i dont know how to actually start the update when the only thing the display says me is to press a buton to shut down the system :(
could someone help me too?
edit : i found out myself how to do it :)
could you please tell me how to get back to the nand you did because im fresh in the scene too and would like to get back to the nand becuase i have the same problem too