Update: my 55" Samsung has had this issue since purchase. See my earlier posts. Here is a better description: regardless of input source the tv would go black and lose picture and sound for 2-10 seconds at a time. It would return to "normal" on its own. This got progressively worse to the point it would happen at least once every 5 minutes. Something else worth noting. If you were quick enough and had the smart remote in hand you could still pull up the Samsung "hub" menu from he black screen. This told me that it was most certainly signal or input related. Swapped power outlets swapped cable boxes swapped hdmi cables swapped inputs tried to reset to factory specs tried to search for updated software basically narrowed it to the tv called samsung they set up to have a repair facility come out. The repair guy called me and basically said he is very familiar with the issue and would order a mainboard and power supply for the tv as this is the problem. Well fast forward to two weeks and the repair man comes out and fixes the tv. No further issues to report after a week. So, if you have the issue. Its most definitely the tv. Call and get it repaired or return it. My my issue is now solved. Hope this helps someone else.
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