miwenka ahh, that explains why boot fails, the u-boot.ext file is for G12 devices. It's odd that you have this behaviour though, as it's normally only seen with very recent u-boot on boxes. Anyway.. download u-boot.bin.wetek-play2 and rename to u-boot.exe and see if that works, it's mainline u-boot from another S905 device. No guarantees..
Not booting also.
Thank you very much for helping.