My Surface Pro 1 had a faint vertical yellow streak on the left side of the screen. Yes the same one that has been alluded to many times on this forum and elseware. It did not bother me enough to return the unit, and so I ignored it. One of the members, I believe it was Mitchellvii, had reasonably suggested that the cause might be a glue/bonding issue. I had need to use it recently and I decided to experiment. I slid my thumb, with some pressure, down the left border/frame, close to bevel edge seam of the screen panel, and then back up again a few times, while observing the yellow streak. To my amazement, imagined or otherwise, it ameliorated. Can anyone confirm this happening or was it a wanted illusion?