I recently purchased a Samsung - 55" Class - LED - NU6900 Series TV. Periodically I would get a black screen with no picture and no audio for a few seconds then the picture and audio would return. This only happens when I'm watching cable, streaming apps is fine. If I unplugged the TV for 30 seconds the issue would resolve until I turn off the TV and later turn it back on. The reason I am posting is to hopefully save others potentially of time and money. I reset the TV even though it was brand new out of the box. I replaced HDMI cable....once I exhausted everything I read a post and thought I would give it a try. I reached out to Samsung support and requested they turn off a feature called "Instant On". I got pushback and was told this only affects WiFi but I was persistent. This setting can only be changed by a technician. The tech remoted into my TV and turned Instant On off. I have not had the problem since. This problem did occur every day. I hope this helps someone else!
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