Sometimes vertical lines on screen

My iPad has been dropped multiple times in the past 3 years or so, although none of them has cause any kind of significant damage, until some time ago, my my iPad would suddenly has thin lines on the screen and experience some kind of image persistence. Most of the time, it was fixed when I restarted it, so I hadn't paid any attention to it. I thought it was a software glitch.

Now it persists on showing the lines on screen. If i press with my thumb on the top right corner and lock and unlock the device it just dissapears. I m just thinking it s a connector problem, but the connectors as I can see on ifixit it s in the top right(let me know if I m wrong). Nothing happens if i press my thumb on the left top of screen.

Any suggestions?