The BuyDisplay China office was quick to send me the datasheet for the three displays that I purchased. I have uploaded them here at Files>BuyDisplays DataSheets. I am trying to use the 7" version which is ER-TFTM070-7. The board is not like the one you attached above. Here is the one I have:
It says the controller is the LT7683, see below. Hopefully, I can connect it up, as the site is reporting that the new tariff are in our court :(
John Owens K1JO