hey guys:
my nanopi2 is flushed for android,And yesterday I found the debug uart doesn work,so I flush it to sd card according to the instruction on
https://github.com/friendlyarm/sd-fuse_s5p4418

but when I reboot the board,the lcd could show the logo picture,and the board have blue led light on.nothing shows on the debug uart,Is it my cpu uart broken? How can I fix this.