I have same problem with my Gearbest Alfawise H96 Pro+ 3GB/32GB, i tried flash ddr3 rom or ddr4 rom with USB_Burning_Tool but have error:
with ddr3 rom at 4% see my pic1.
with ddr4 rom at 7% see my pic2.
I tried same with your method, create a sd card first with ddr3 rom img and after with ddr4 rom img but my tvbox not want start flash, it stuck in red light and my tv show not signal.
My motherboard is this in pic3
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