TOSHIBA PLASMA 50HP66 TV

HI GUYS I WAS WONDERING IF YOU COULD LEAD ME IN THE RIGHT DIRECTION TO HELP ME SOLVE MY PROBLEM I WAS WATCHING MY TV AND A THICK WHITE LINE APPEARED THROUGH THE MIDDLE OF MY SCREEN FROM TOP TO BOTTOM THE PITCHER WAS STILL ON BEHIND THE WHITE LINE FOR ABOUT 10 SECONDS THEN THE SCREEN FADED TO BLACK THERE IS A SLIGHT GHOST IMAGE THAT FLICKERS ON ONCE IN A WHILE BUT THE SOUND IS UNEFFECTED , I DID SOME CHECKING AND I FEEL IT MIGHT BE THE Y SUSTAIN BOARD BUT IM REALLY NOT SURE. PLEASE HELP. BUBBA