My Tv won't turn off or change inputs...

My Tv won't turn off or change inputs...

My Samsung ln46a650 won't turn off or inputs from remote or from tv itself. The light on the tv shows me its reading the remote so why wont it shut off the tv or even on the tv itself...

ANSWERS:

My Samsung tv says to Press and Hold the power button to turn on or off so just trying to clear this up !