Good morning colleagues! I tell you this problem! And I appreciate your collaboration! This LG led TV model 47la6200 does not give audio or video! The output voltages are correct! And almost exact in their 3.5v and 12v values! Except for the 24v that generates 24.7 volts? In my opinion something high of the nominal value! But here I request your first opinion! One of the other details is that 78 volts are supplied for the LEDs! And from the negative line of return of the LEDs! 15volts return? Disconnect the negative poles of the LED power connector! To verify if that voltage was supplied by the source and not !! Indeed that voltage comes back from the line of the LEDs! I thought it was a short led! And disassemble the entire screen verify each strip! And none is burned! Not short! In the same way by putting the negative poles to the chassis I can turn on the LEDs but still do not give video! I appreciate your collaboration! ! regards