hexdump

@Slash402 - it is not uncomming for chinese android tv boxes to have fake specs - one cannot really trust anything, from ram to emmc sizes, emmc vs. nand and even sometimes a different soc is inside than what is printed on the box

@stut - here i wrote down quite a bit of information about how to build mainline u-boot for amlogic s905x/w devices - see: https://github.com/hexdump0815/u-boot-misc/blob/master/readme.gxl - you might try the ones i built (see the july 18 2020 releases of that github repo) - gunzip all the files with boot-amlogic_gxl_*.gz and then dd them to an sd card and try to boot them one by one with serial console and a hdmi monitor connected (some have serial console and some hdmi) - if you are lucky one of them maybe gives you a working mainline u-boot you can boot from sd card good luck and best wishes - hexdump

@SteeMan - in case you want to experiment (i.e. not sure if it really works), you might play around with chainloading the g12a-u-boot.bin (s905x2) and sm1-u-boot.bin (s905x3) from https://github.com/hexdump0815/u-boot-misc/releases/tag/200926-01 or gxb-u-boot.bin (s905) or gxl-u-boot.bin (s905x) from https://github.com/hexdump0815/u-boot-misc/releases/tag/200718-01 ... basic chainloading goes like this - https://github.com/hexdump0815/imagebuilder/blob/master/boot/boot-amlogic_gx-aarch64/s905_autoscript.txt - maybe compare it to the balbes150 boot scripts for fancier ways and most probably better armbian integration ... the files mostly exist in a serial version for serial console and another one for hdmi output and usb keyboard input (which sometimes works and sometimes not) ... better ignore the boot-xyz.dd file at the links above - they are for booting amlogic boxes without the legacy u-boot, but using them is quite complicated and risky (you can seriously brick the box worst case) as mentioned all this is without any warranty or support, but it might be a good starting point for experiments good luck and best wishes - hexdump