Chosen Solution
The screen display bottom half is completely black. Before that, it should a couple of green lines horizontally so restarted? Is this logic board?
To be sure you can plug in an external display to see if the problem is present on it. Sadly, I think your internal display is damaged, either the LCD ribbon cables or the T-CON board its self connections have failed. MacBook Pro 16" 2019 Screen Replacement Make sure you get a recycled screen otherwise you’ll need to calibrate the display, sadly Apple has not released the needed tool to do it so you won’t have brightness, camera or TrueTone functions.
