Risinghf outdoor miner with CM3 not booting

[n123al]

I tried to flash my risinghf outdoor miner with CM3, it looks like it was flash ok, but it does not boot. When I re-flash it to the original firmware, it works. Since I find nebra firmware much better, I will truly appreciate it if the issue is fixed and I can use this firmware.

[rambetiko]

My risinghf device did not boot either.

[Glue7659]

Mine does not boot either. Board blinks 4 times in a loop.
I have flashed with different cables and the result did not change.

[druckmusik]

Same challange here - flashed the PI-board on macOS and just get the four blinks in a loop. On a Windows platform I can not even use etcher to the full extend.

Are you guys using a serical connection to flash or the Nebra-USB-2-SODIMM-board?