Vertical screen lines have become very difficult to work with and have been getting worse over the past few weeks. They appear at startup and will slowly go away after the device boots up usually. Now the lines will come up randomly. I have done the flex test on the screen and it does cause it to go in and out of the vertical lines. I have deleted and reinstalled all the graphics drivers so I am sure it is not a software issue. Just not sure if I need to replace the screen or some kind of connector cable. Whenever the screen is not having the vertical lines issue then it looks and works fine. I put this off for a while because it would only be for a few seconds but now it will get stuck in the lines no matter how much I move the screen around.