Question Why is my display acting like this?

R_1

Expert
Ambassador
welcome to the forums
this is all that the screen displays, even during POST/boot? no drivers are needed during boot and a failure here leans towards a broken device.
when you close the screen does the displayed image change? its possible the display ribbon cable is loose, and movement would/should/could cause the image to change.
the fact that the HDMI will drive another display means the GPU is good. the issue is in the panel itself.