On my 3 year old laptop (HP dvEnvy7), a very thin line of black pixels has showed up. The first time it showed up was on the red background login screen, and I think tapping the monitor made it go away, but that might've been coincidence. I just noticed it again in the same place where the color of the screen is green. I was running an MBAM scan while that showed up and the line went away, again I don't know whether that was coincidence. I've read that this problem could be caused "by the traces going bad in the video cable going from the LCD the the main board" due to the laptop lid opening and closing. The lid is getting a bit loose. Is this the answer or could there be something more malicious, as my paranoia comes back to haunt me?