UE40F6400: Turn off and turn on..

[MLK]

Hello,
I'm in Italy and I bought this tv from france (eollis 3). After 2h using the new TV starts to turn off and turn on again itselves, I can do nothing, only turn off for several minutes and turn on again. But after 20 minutes starts again. This problem I had last year with another samsung tv bought from same online store, but the problem started after 4 months, now after 2h!
Is a tv hardware problem or is something that I do? In Italy the full code of this TV is UE40F6400AYXZT, instead this from france is UE40F6400AWXZF. Could I resolve with a firmware update?
Please help me

[davdenic]

I've the same issue on my 32F6800.
The issue appeared 1 month ago few times, but now several times during the day.
I tried detaching any device and cable but it continues turning off and on.
If I move the tv far from the window the problem seems solved.
Maybe there is an interference from external sources... I don't know.

Ps I speak Italian too. If you want to send me a PM...

[markf]

Hi. My TV 40F6400 begin this same problem now after 3 months of use. I dont know what to do. In this video http://www.youtube.com/watch?v=14DPDV6Wf5U show exactly the problem. A person has recommended slapping the back of the tv, and work in the moment, but the problem back again. Another person said that problem is on the board of the source. Another said it was cold welding in transformer frequency in the source plate.