Middle of the screen is grey... no cracks but I think it was ran over

I found the iPad under my SUV ground is soft - no cracks, not bent, few on the front screen and it was left outside from 530-1130 so it was either over heated bc it's hot here in Georgia or it was ran over and just didnt crack or bend.... only the middle of the screen is greyed out with a few vertical lines through it that are not grey - fully functional you can even push buttons through the grey screen if you know where to push bc obviously you cant see through it... I've tried pressing home and power button but nothing changed after reset- should I take it apart yo see if anything was disconnected or could it be heat related