The t con board or the LCD panels is faulty. Can confirm only by replacing the Tcon board.
If you wish to know more about Tcon board problems and troubleshooting then check the following link. http://electro-medical.blogspot.com/
Check and replace the backlight inverter board. Do not think that it works only with some capacitors. The inverter transformers are the main component on that board, and always gets shorted inside, and is irrepariable.