Dropped my phone. Now the white balance is off

Hello everyone,

a couple of days ago I dropped my phone. After I picked it up I immediately noticed that the screen had a greenish tint. I was able to fix it kinda by going into the settings and changing the color calibration. But there is something else wrong. The white level and black level and also the color calibration depend on the brightness now. When I increase the brightness, the screen gets blueish and it gets hard to tell white and light gray apart. Same thing then I dim the screen. The colors get warmer and dark gray start to look like black.

How is that possible? And can I fix it without replacing the screen? I already opened the phone and reseated the screen connector, but that didn't do anything.

UPDATE: I reseated the connector a second time and now it is much better. The colortemp does not change with brightness any more and also the problem with the black and white levels is gone. The greenish tint is still there though