andrew
2
Try setting the DIP switch to Boot off the SDCARD.
https://forum.rvspace.org/uploads/default/original/2X/4/4db77020da798735769c08c2a8b2f90e5707b37d.jpeg
Then when you get the
BOOT fail,Error is 0xffffffff
Press the reset button for about 1 second and see if it boots then.
You may need to try a few times.
Additionally you may want to try with a different brand of SDCard.
You can also try my Gentoo Image and see if that boots
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