I had the same error(4042) on iPhone 11. It had the black screen of death. It didn't do anything. So I left iPhone plugged into my pc, while i went online to research this error code. This forum was the only thing that pop-up. This was an hour ago. Then as I'm reading these issues in this forum, my phone sign out of iTunes and came on and it works just fine. It just seems funny to me after reading these issues I thought my iPhone would never work again. I'm pleased or blessed cause it found a way out. Credit goes to the extra ordinary intelligence. Thanks.