Read this recent discussion to your TV repair tech.
Also ask them to clean vents and heatsinks while they are in there.
This is NOT a diagnosis. That is done by the tech on site.
Hey guys, new to the forums but i have a really bad problem with my UE40D5520. This has only just started to happen about 2 days ago now. Whenever I turn the set on I get this thick dark line appearing at the top of the screen which gets lighter as it runs towards the right hand side of the panel. After about 10-15 minutes it disappears and goes back to normal.
Obviously there is something wrong with it and I want to know if it has happened to anyone else with this model and if there is a way to fix it or is it slowly on its way out?
I've attached a link below to show you what it looks like when the set is first turned on.