SONY KDL-70R550A LCD TV HAS NO PICTURE OR SOUND,SCREEN WILL COME ON WITH JUST BACKLIGHT.THE GREEN STATUS LIGHT COMES ON AND BLINKS WHEN BUTTON ON REMOTE OR TV PANEL ARE USED.

REPLACED THE T-CON BOARD AND LOOKING AT THE BACK OF THE TV LOOKING FORWARD UNHOOKED THE LEFT BOTTOM RIBBON FROM THE T-CON BOARD AND STATUS LIGHT TURN RED AND HAD 5 RED BLINKS,WHEN UNHOOKED THE RIGHT RIBBON NO RED LIGHT OR BLINKING JUST GREEN STAUTS POWER ON.NOW WITH BOTH RIBBON HOOKED UP AND THE RIGHT SIDE RIBBON TO DRIVERS UNHOOKED TV SCREEN HAD VERTICAL LINE ABOUT 3" TO 4" WIDE IN MIDDLE OF SCREEN AND YELLOW/WHITE IN COLOR ALSO HAD SMALLER VERTICAL LINES TO THE LEFT OF THEM SAME COLOR.I TRYED THIS ON THE OPPSITE SIDE AND GOT NOTHING BUT A BACKLIGHT SCREEN.I CAN NOT GET ANY SOUND OUT OF ANY INPUT,NO MENU AND WILL NOT DISPLAY ANYTHING ON ANY INPUT. HELP PLEASE.