Much more varied in
I'm glad you solved it. I was scared for you. Sounded like the black screen of death, but I think Subaru anticipates us to be idiots.Answered My own question. Turns out that I had a bad USB drive. The drive would authenticate and let me start the install but then shows a black screen and flashing hard buttons. I switched to a different USB drive in the install was a success. When it’s installing you were supposed to get status updates if everything is working well. Many thanks to the OP!