I´ve a vertical white line in the screen that appear after my lapt hit

Hi Guys

My laptop was running out of thermal past and because I have it always on at home but I don´t use it very often, I didn´t realize about it, I only saw it one day that it just turned off running super hot.

I´ve open it, I put thermal past in the CPU and it works very well again, except for one very samall detail, a white small line appear in the screen and I´m not sure how to solve it, because I´m afraid that the display is fine, but eigther a connector or the video card can be damaged due to the high temperature.

I appreciate any help.

Thanks,

Mauro.