Be sure to ask Samsung how to check and update the firmware. If it's still failing and support is not sending out a repair person I think you know your next move.
Also, sometimes Samsung support forgets to tell you to factory reset the TV after that update. And even so, you want to do that reset if the firmware is up to date, just to give it a chance.
Note: Moderator edited spelling error.
This TV has just been a royal pain. Got it last week, first one did not work out of the box. Exchanged it with the retailer. Second one turned on, YAY! However, I am having all kinds of little glitches:
1) Remote doesn't let me open apps from the short cut. I can move to and select the app, but clicking to open it doesn't do anything. I have to go search the app, then select it like that and then open.
2) MAJOR ISSUE, the screen keeps going black. Sound still on. I checked all the eco settings, etc. Made sure I disable all the BS they put in there that doesn't work properly to begin with, and it still continues to turn the screen black. It happens after 15mins sometimes, sometime little longer, or less. There is no telling. But this is annoying, is anyone experiencing the same?
It is really sad that mfr that used to be one of the best at TV is producing such mediocre products now, with a pretty hefty price tag still. I am seriously just ready to go exchange for Sony or LG.
Any help is appreciated. Samsung customer service is USELESS!!!

Chowhound
Comic Vine
GameFAQs
GameSpot
Giant Bomb
TechRepublic