Chosen Solution
My 5 year old UE55KS8090T started acting weird about a week ago. Initially the picture is perfect but, after 30-60 minutes a ghost image moves up and or down (scrolling?) . This happens on all channels and even the settings menu of the tv is not save. If the television is left on, the picture changes to only multicolored, vertical lines. When shut down for a couple of seconds, it jumps back to scrolling after 5-10min. When shut down for a couple of hours, it gets closer to the 30-60 min. again. Most of the electronics looks good in my inexperienced eyes (can provide picture/video). But one of the heatsinks has some discoloration.
You need to call a Ghost Exorciser! Seriously, though, an overheating issue is likely. A way to detect it is to use a can of freeze with a tube to pinpoint direct the spray to specific components. You can use a general spray to first narrow it down to a small area. If you can replace just the component you are good to go, but it may require replacing the whole assembly.
