Hi I have the sharp 60inch, when i power on there is nothing on the screen, so it is the MB problem or one of the Resistor is opened or the LED are burned. Thanks

Your explanation is saying that you have a dead set.it can be what you mention.but check your power regulator.or the following componets.horizontal output transistor,flyback,10 mf cap in the power supply and there is another 10mf at the input of the flyback along with a diode.there is also a resistor in the same area that you need to check.if that does not not solve your problem take out the microchip the number on the board is 506 when that is damage it can cause your set to dead.around that same ic there is a diode and a little transistor check them if they are shorted they can be the culprit that damage your microchip ic.