Hey Guys I'm an old relic from the the old school of predigital electronics. I used to repair Xerox Copiers back in the dark ages (the 70s) so please bare with me. I don't even know if I'm asking my question in the right forum? Here goes anyway.I have the above mentioned plasma flatscreen that I have used daily for the past 4 years with no hint of a problem. In spite of some of the feed back I have read from other members I have gotten mucho bang for my buck...but 2 days ago I noticed just 1 pencil thin line that runs vertically from top to bottom about 12 inches from the left side. Could anyone...