The board cann’t boot from sdcard without any default ouput log on /dev/ttyUSB1. But there is only one output log “Error 0x0000000000000005” if you push the reset button continuously or push once without sdcard. I changed a new sdcard but it still doesn’t work. I find the error code "ERROR_CODE_SD_CARD_CMD0"in ux00boot.c and i think it means sdcard reset failed. Any suggestion will be appreciated.