I solved the issue and this is how.
After lot of research and dozens of suggestions I decided to try something simple first.
My Samsung UE39F5500 was connected directly to the Internet, no cables apart from the power.
I opened the back of the TV and made sure everything was properly connected especially the highlighted part on the image. (shows how technical I am).
Solved! Go to Solution.
My samsung tv is the same it has a shaded area right across the top of the screen unfortunatly it is out of warrenty so i guess thats it for my tv too.
no i have had it about 7 years so i guess it has done well compared to some peoples.
The dark band only appeared yesterday and came across this forum.
I unplugged it last night but forgot to remove the cables and i know what you mean about a software issue as it looks like the top part were the drop down menu pops up.
this is Pure garbage my tv is doing exacly the same thing the dark shadow appears on top of the screen it sometimes moves to the botom of the screen sometimes it fixes itself and everthing works fine for a 2 days than comes back again no one in their right mind should purchase samsung garbage tv.