Weird shading pattern on display? pics

[Ben Go]

I have a Dell Xps 13 and I had to take it apart today to clean it. After I put it back together I have this weird, light pattern on my display. It's as if every other light on the bottom is turned off? What would cause something like that? It's gotta be a hardware issue as it's visible upon boot and BIOS. Nothing seems wrong or off in the BIOS. I don't get it, any ideas?

Photos

 

[Ben Go]

The screen light diffuser is not seated properly. It is located behind LCD panel.

Thanks so much! Reading up on screen light diffusers now.

I don't see anything in the BIOS

Do you know if that is adjustable from the terminal? Or is this something I might have messed up when I opened up my laptop and have to open it again?

 

[Ben Go]

It's a hardware issue. Try pressing the plastic around the display (especially top and the bottom part) with your hands and se if it changes. Maybe it will settle.

Thanks, I have tried that, I will open it back up tomorrow and see if my lcd connector is a little loose.