I was watching tv when it just turned off and will not turn back on, no sound, no pic NOTHING, can any one please help. It is only 2 1/2 yrs old, it is a magnavox 42in 1080 hdtv

 

Have you checked for blown fuses?

 

When you try to start it does it make a noise?
Does an LED glow and then go out?

 

With this kind of tech you would probably be better letting someone who has (hopefully) made all the basic mistakes, ie a TV repair shop.