Broken display | First replacement display is faulty, the second too

Weeks ago my PSP display broke (impact).

I replaced the screen without any problems but the new one was faulty: when I turned the PSP part of the bottom left corner was black with a orange-ish glow (white in the photo I shot) .

I did not force the component in any way, so I asked for a refund and bought a new one.

The problem is, the new one has exactly the same issue.

To be clear: I never even touched the screen in the faulty area, let alone pressed it.

Can someone help me figure out if both diplays have the same defect, or there is a broblem with the mainboard?

Thanks in advance