Graphical glitch on left side of screen

I am fixing a friend's macbook. There is a consistent graphical pattern on the left side of the screen, akin to tv static (photo 1). I disassembled the computer and could not find anything wrong.

• When I connect the computer to an external display, the external display has no graphical errors (photo2)(see this question: New Display, boots fine, after few minutes presents glitch & goes dark)
• The display data cable does not appear to be damaged (photo3). Although, I will not rule this out
• There does not appear to be any damage to any socket or other part of the logic board (photo 4). I will not rule this out either

Does anyone have any ideas or suggestions? The only clue I have is damage on the plastic bezel (photo 5) that goes around the wifi card, indicating the computer was dropped. I have included photos I thought to be relevant. Thank you in advance.