Power & Source of Big Ideas

HI I follow the process for compile and update u-Boot in link http://wiki.friendlyarm.com/wiki/index.php/NanoPC-T3#Compile_U-Boot, it works fine; after performing the process, the system did not boot properly and does not boot with SD the only thing it does in sending the RS232 port debugging the me...
I make the procedure, but after this i reboot an only see this, no more, and fastboot not work again -------------------------------------------------------------------------------- Second Boot by Nexell Co. : Ver0.6.1 - Built on Oct 16 2015 13:42:17 -------------------------------------------------...