when i got this (from a child on facebook marketplace) it had the classic "stage light" effect when nearly closed, and the backlight cut out entirely at around 30° open. this page and linked videos were helpful:
https://logi.wiki/index.php/A1706/A1708_TConn_Backlight_Pinout_(FlexGate)
the camera cable also has a sharp crease but it still works, for now.
it's exciting to see "flexgate" up close at last! this happens on almost all mac laptops to this day, btw 😓
i mean, would've presumably happened within a few weeks of regular opening and shutting too, but still. what if it wouldn't have 🫣