No, not a discussion about a police sitcom. I've had my 55" C8 for two months and am a very happy owner. Two nights ago a thin vertical blue line appeared running from the top of the screen approx one third of the way down. Very noticeable on dark scenes. I did a pixel refresh and at first I thought it had gone but it was still there but moved to the lower two thirds of the screen. It was also thinner than before, probably changed from 1mm to 0.5mm. I did another pixel refresh and it's gone now but I shall keep an eye on it. Any thoughts what could be going on?