As usual, the student claimed they had no idea how this happened.
I, on the other hand, can tell exactly what’s happened. The ‘ring’ fracture here suggests that it’s had inward pressure applied to the centre of the lid while the laptop lid was closed. Most likely cause? Cramming the laptop into a full bag which has then been at the bottom of a pile of bags, sat on, or used as a pillow.
Replacement LCD panels are not cheap.