Hi again @clacri, I expect you already read the other black screen thread. When my Xiaomi went “black screen” I re-read that thread, people reported it was actually “black screen but on”, not OFF. In my case in a darkened room I could tell that I could actually power off, but then the phone would silently boot back to “black screen on”. Another clue is whether the phone reacts at all to a charger.
You might see parallels with this thread?
I cannot actually offer a way forward, nor from the log, can I see what exactly made Easy Installer fail.
I can very much see the argument for returning it to sender on the basis that it did not meet your reasonable expectations and is therefore no use to you.
Had you already decided to send it back, you might decide to have one last throw of the dice and see if a PC (or Easy Installer) could make any sort of connection with it while pressing the Power button, or Power and Volume buttons.
Edit. Good morning @clacri, I woke up with this thought. Could the log be explained by low battery charge condition at the start? It just run out of juice?
Taking it a bit wider (I have no GS290 - I cannot check) my Xiaomi does charge in Recovery. I would be interested if there is anyone who can tell us if GS290 closes charging while in Recovery.