Hello to the forum. I have found a lot of helpful info on this site but I am now having an issue with my 55" ST30. I bought it in early 2012 and it has worked great for the past few years. It has a little over 5000 hours and the most up to date firmware. Recently, though, when the background screen is off-white to light grey in color, I get this flickering purple interference. It can happen on a static image or moving scene but it always seems to be visible when the background is a white to grey color. I tried running the wipe bar function overnight as well as the Disney WOW pixel flipper overnight and it's not getting better. Source material doesn't seem to matter either, cable, Blu, Smart apps, etc. They all do the same thing. If I go into the service menu and do the color slides, the colors are OK, but it does it on the lighter grey and white slides. If the picture is not white or light grey based, it looks OK, but there is still detectable flickering.
I can see that there is IR (will post pics once my post count is enough) but I wanted to make sure it wasn't anything else. Any help or guidance is appreciated. Thanks.