Ok.. I managed to successfully replace the cracked screen of my phone but.... the new scream has a lighter/yellowish halo in the upper-right corner... just below the bluetooth icon.

At first I thought it was maybe a poor quality replacement screen.. then I realised that it happened only when the screen is fully pushed in the phone case. I tried a few times to detach again the screen from the main body, and push it back again.. when detached it looks good enough, when pushed it the halo appears again... any clue if I might have done anything wrong or it's just a bad screen?

thanks!