I followed some web pages...
But my beagle board is not alive..
Actually, I can't remember last command.
The thing to excute last last command is "nand erase 0 80000 then
reboot" (this is instruction in web page.)
Yes, you definitely removed its brain. I would follow the process described on the Rev C validation site to recover the NAND. This is the process that is used to flash the board at the factory…