As I was saying , this is a common problem for this serie of Samsung tv and there has been a lawsuit settlement against Samsung for this issue and your tv has the first symptoms of this problem.
You can see the details at the link below;
At this point what you need to do is to call Samsung at this number 1-(NNN) NNN-NNNNand specify the "capacitor issue" .
This problem usually gets worse over days/weeks until the tv does not turn on anymore .
You are at the first stage of that problem but it would get worse if not repaired , so if you are asked how long this problem appeared , just say a couple of weeks , this will not be a lie , just will get your case processed faster.
With your TV's model number I do know for sure that there are bad capacitors in there.
Give them a call at that number and for a tv of that size they will arrange for a repair shop to come to your home to repair this.
In the mean time you can leave the tv on , I have one with the same problem that has been on for two years now in the store window , just did get around to replace those capacitors :)
Hope this help and I will be in standby if you have any questions.
Thank you and please take the time to rate my answer if that answers your question and you can still reach me here at anytime after this chat is closed if you have other questions.