My 37'' LCD TV just made a crack sound then no sound or picture but the power light is on, any ideas? oh and a burning smell

I would guess that would be a Philips TV? Most likely a capacitor in the power supply has failed, and that pop was the capacitor exploding. For most sets a new power supply board is around $200+labor, although anyone who can do simple electronics repair could replace a failed cap for less, as long as that is the only problem.