I have a 2007 Magnavox 42" LCD TV (42MF531D/37A). The last few days I've noticed a thin (maybe 1-2 pixels wide) solid magenta vertical line running up and down in the exact same spot. It's not ghosting or anything like that. The picture quality is great...except for this solid magenta line that comes and goes. It seems to happen 5-10 minutes AFTER I first turn on the tv. But not always. There were 2 days it didn't happen at all.
I played with the tv's aspect ratio, altered the picture controls, watched HD and non-HD shows. I made sure the plugs and cable line were secure. I rebooted the HD cable box. I put on a DVD and it was there too. But as I said..it's sporadic. It not always shows up...but when it does...it doesn't stay there permanently. It eventually goes away.
Any ideas what this could be before I go out and buy another TV? Sad...because my 3-year extended warranty just ran out 4 months ago. Figures. I was thinking of maybe trying to get the cable company to swap boxes just in case its a cable box defect.