So I have a Samsung PN58B650 that I had the panel replaced under warranty to try and fix the buzzing. So after we got it back together and hooked back up it seemed to work fine, but later that night it developed this thick magenta line from top to bottom (probably an inch wide or so). So the tech said that it needs another new panel, so they actually picked up the TV today to do it at their warehouse rather than in my home.
Anyway, the dropped off a loaner (which sucks BTW and is only 37 inches and not 1080p) so I just hooked it up and went to work. But when I got home tonight I noticed that this loaner TV has a thin magenta line from top to bottom (roughly 1/3 the way across the screen from the left which was roughly the same spot as my actual TV). This line is significantly thinner (only a couple of pixels wide), but it seems VERY strange that this is occurring. I don't know what could cause it other than a bad panel, especially since nothing has changed in my setup since trying to replace the panel on my TV.
Is there something that can be "frying" panels causing these magenta lines? That doesn't really seem possible, but it is seems VERY strange that it happened on two TVs in roughly the same spot (proportionally). I am afraid to try another TV.