Hi @joshua221 ,
What colour are the lines?
If they’re black then it may be that the tab board connections to the screen have come loose at that point.
These connections are very fragile and the best that you can do is to see if you can gently push the cable back onto the screen and hopefully it will stay there. If no good it will mean a screen replacement as it cannot be repaired
If they’re coloured then it may be a loose connection between the tcon board and the tab board.
In any event check the connections between the tcon board and the tab boards and the tab board and the LCD screen at the point where the lines are.