I tried the first start at my brandnew Helios 64.
U-Boot 2020.07-armbian (Oct 13 2020 - 16:49:59 +0200)
SoC: Rockchip rk3399
Reset cause: POR
DRAM: 3.9 GiB
PMIC: RK808
SF: Detected w25q128 with page size 256 Bytes, erase size 4 KiB, total 16 MiB
MMC: mmc@fe320000: 1, sdhci@fe330000: 0
Loading Environment from MMC... *** Warning - bad CRC, using default environment
In: serial
Out: serial
Err: serial
Model: Helios64
Revision: 1.2 - 4GB non ECC
Net: eth0: ethernet@fe300000
scanning bus for devices...
Hit any key to stop autoboot: 0
switch to partitions #0, OK
mmc1 is current device
Scanning mmc 1:1...
Found U-Boot script /boot/boot.scr
3185 bytes read in 7 ms (444.3 KiB/s)
## Executing script at 00500000
Boot script loaded from mmc 1
117 bytes read in 7 ms (15.6 KiB/s)
14089141 bytes read in 951 ms (14.1 MiB/s)
27275776 bytes read in 1856 ms (14 MiB/s)
79946 bytes read in 17 ms (4.5 MiB/s)
2698 bytes read in 12 ms (218.8 KiB/s)
Applying kernel provided DT fixup script (rockchip-fixup.scr)
## Executing script at 09000000
## Loading init Ramdisk from Legacy Image at 06000000 ...
Image Name: uInitrd
Image Type: AArch64 Linux RAMDisk Image (gzip compressed)
Data Size: 14089077 Bytes = 13.4 MiB
Load Address: 00000000
Entry Point: 00000000
Verifying Checksum ... OK
## Flattened Device Tree blob at 01f00000
Booting using the fdt blob at 0x1f00000
Loading Ramdisk to f5177000, end f5ee6b75 ... OK
Loading Device Tree to 00000000f50fb000, end 00000000f5176fff ... OK
Starting kernel ...
But this is all i can see
No login possible - is there somthing eles to know ?