I installed new firmware (had to use Amlogic USB Burn Tool and toothpick method). Aidan’s ROM Android 7:
After installation I was not able to boot CoreELEC from any USB port or MMC slot, toothpick method didn’t worked either. But Android worked fine. Thanks to @kshi I tried to use:
With a help of “Reboot to LibreELEC” I was able to boot to CoreELEC NG (which was not booting before). Then successfully ran “inject_bl301” and it worked.
I didn’t had time to test a lot. But only thing what is not working (but it was working not in NG builds) is:
ceemmc
Starting CoreELEC eMMC installation tool…
System is not supported: gxl_p212_1g!
It would be really nice to rewrite Android with CoreELEC, maybe there is a way?
Thanks everyone for help! 