Edit: Solved, my third try blindly typing "down", "left", "enter" etc. to change the default display worked!
Dear #thinkpad bubble,
T460 with apparently a broken internal screen. It boots and I get something on an external display, but only some time after booting started (maybe when Linux is switching the graphics during display).
Is there a way to access the BIOS and switch the default to "external display"? Without me "seeing" the BIOS on screen?