how would i diagnose and fix this?

it’s a 2019 macbook pro 13”

the display was working depending on the tilt of the screen (so i’m guessing it’s a frayed / loose cable somewhere, that’s going from mobo to the display), but now the display isn’t working at any angle

i used to be able to sometimes push near the bottom of the display, put it just at the right angle, and then it worked - but it seems like the cable(s) that are broken must be pretty well fked now

thoughts?