M1 MacBook Air dead screen?

I have an M1 MacBook Air, less than a month old, thats video ceased to function (no backlight and no signal on external display), but I hear the startup sound so I know it’s turning on. The keyboard backlight seems to be out too. Happened a few hours after updating. This past week. I’ve got an appt at the Genius Bar tonight.

Doesn’t make sense. Never got wet. Never dropped. Protected with a shell case. I updated it... And I did have it connected to an external display the last time i saw the screen on, which did occasionally start having issues with losing signal after I updated.

At first, I thought maybe it was a bad screen but if it was just that, I should be getting signal to an external display. Am I wrong?