Apple MacBook Pro, Blank Screen

Got a duzzie one today.

A Mac Book Pro model a1707, screen blank, but it looks like it is starting.

  • If I press enter it goes Boink
  • Reset NVRAM settings, reboot with press and hold Cmd + Option + P + R, does nothing.
  • Reset SMC settings, Mac is still OFF, press Shift + Option + Control and Power keys at the same time. Does nothing
  • Purchases a USB-c to HDMI, plugged in.
  • Setting up Screen Mirroring when not logged in.
  • This Mac has one of the changeable Touch Bars.
  • Fn-Ctrl-F1 does not mirror
  • Fn-Option-F2 does not mirror
  • Command-Brightness Down, holy crap that works. Hat Tip.