UN65nu7100 black screen is on, no picture, no sound, after splash screen

[Feal]

I have a 65" un65nu7100, when you plug it in, the "Samsung splash screen" shows, then the screen goes black for 4 or 5 seconds(off), then the screen lights up but black, no sound, no picture, and stays that way until i unplug it. Im not sure, but i feel that the leds are fine given the splash screen is clear and working fine, but im not a expert. Any suggestions would be greatly appreciated, as i like working on things, and dont really want to buy a new tv. Main Board??