Screen went half out then completely black

My vizio model P502UI-B1E was working fine then while on the right half of the tv went scrambled like static almost with black and white lines. Turned the tv off and now it stays black. The white light in the corner turns on when you hit power then slowly fades off. Thinking its the main board from what ive read but the initial half of the screen cutting out had me worried maybe it has to do with the leds. Any help will be greatly appreciated will take it apart for pictures tomorrow and add them.