My client has had the tv since 2013
The problem only started happening three weeks ago.
I've not checked all the inputs but have connected it to the network and tried to watch YouTube.
I can't get very far as the tv keeps switching off after two minutes startup.
This could be a PSU problem but I've also heard it could be a tuner problem.
I'm not convinced on both but I'm lost on this one.
If it was a PSU problem the power issue would be intermittent.
I will check the other inputs to make sure they work and cause the problem to stop.
I know some televisions have a function that if there are no inputs connected the tv will switch off after a given time. But not sure if this samsung model has got these settings