Stuck on fastboot flashing unlock(Now Black screen)

[Chris375]

@aibd

Did you do the whole of the proceedure here Installing /e/OS after removing UbuntuTouch on the GS290?

To someone in the same position as you, would you say that was the solution?

I can also confirm, that this procedure solved the black screen issue after flashing /e/OS with Easy Installer. A stock Android version is up and running again. Thanks for the info!