I have done:
1.Jumper the Force Recovery pins (3 and 4) on J40 button header
2.Jumper the J48 Power Select Header pins and connect a power supply to J25 power jack
and run in host linux sudo ./flash.sh jetson-nano-qspi-sd mmcblk0p1
the result is :
###############################################################################
L4T BSP Information:
R32 , REVISION: 2.0
###############################################################################
Error: probing the target board failed.
Make sure the target board is connected through
USB port and is in recovery mode.
what’s the matter?