This is an outdated version and all the issues you decide on your own.
This question has already been described several times in this topic.
There may be many different reasons (incorrect data in dtb file, outdated firmware and u-boot, etc.), which depend on the hardware itself. This issue you need to decide with the equipment supplier.
The basic equipment provides me firm Khadas (VIM1 VIM2 etc). There are several variants of TV boxes Tronsmart Vega S95 (s905), S96 (s912) and s812. There are also many different noname s805\s905\s905x. All checks for S905X and S912 I spend on the equipment Khadas , part of the checks for s905\s912 I perform on Tronsmart. Check on the equipment noname I perform very rarely, on special request. Based on this, I can guarantee work on Khadas equipment. Other options are supported as optional as possible.
Information for communication you can find on this page or write to the PM.
https://github.com/150balbes