It was delivered yesterday. It took 40 minutes to assemble the stand. Connected to freeview box and dvd player via scart. While playing with it, suddenly many (about 20) blue vertical lines appeared on screen. Switching inputs didn't help. I had to turn it off and on, then it was ok. Some time later it happened again. Turning on/off solved it. Then I tried to make it happen again but couldn't find how. It happened 3 times on first day. On second day (today) it is not showing the problem yet. I asked my wife to take a picture if it happens again. Is it just temporary problem with settling or aging? Or do I need to return it?