Got sound but no picture

Got sound but no picture

Hi there I've got philips tv model No 47PFT6309/12 screen is black but I have sound, when i put torch to screen i can see picture what board do i need to replace??

ANSWERS:

@wolbrand check the voltages from the power board to the backlight LEDs. This is either a bad power board or failed backlight strips (most likely). Let us know what you find.