I did a battery replacement and have the same issue.
However, I do not thing it is the pin being damaged.
I carefully inspected the pins with a microscope. There is nothing wrong with any pins. My LCD flex cable was pinch a little bit though. I can concluded that it is either the LCD flex cable or the stress from pulling the screen up when trying to remove it damaged the screen. The probability goes to stress from pulling the screen as there is where most people pull on the right side.