Good morning friends, I appreciate if someone can help me, what happens is that I got a lg sound system with video output, model lx-d2960a with the problem of no audio, I measured the voltage of 35v at the output of the source of power, and they are not, I already changed the optocoupler, the adjustable zener, tl431 and the fault continues, now I think it is the strx6759, but I do not get it, I have the strx6729 that I took it out of a panasonic, I saw the datasheets but they seem the same to me, that's why I come to you since I'm not very sure, thanks in advance, excellent day