This problem, from your description, is very unlikely to be because of a change in your settings, if nothing happens when you try to turn your computer on.
If no power is being supplied to your computer - no lights come on - then
you might just have the combination of a flat battery and a faulty power adapter. You must test the power adapter (measure the output voltage with a voltmeter) or obtain another one (preferably temporarily/borrow) to see if your computer will turn on with that. If your power adapter has failed it must be replaced. If still in warranty, Samsung or your retailer/dealer should replace it at no cost. (you should not attempt to repair a power adapter)
Otherwise (or even as a first step) I suggest you contact Samsung support by email or Live Chat (details are on this
webpage.) Please have your computer's model number, serial number, operating system and other details to hand (the numbers
can be often be found on labels on the case of your PC)