Re: LG 50PG6000 No Picture with sound, and boards seem OK

ok pulled out the two buffer boards, the Vsc and Vy go to the nominal values. I've found the bottom y-buffer board have some output pins shorted with the positive rail, in the first test I've checked them only in respect the gnd. And this was my error. I think that the problem is solved, but I'm waiting to have the new board for the final tests

Re: LG 50PG6000 No Picture with sound, and boards seem OK

I've the same problem on a 50PA4500 Tv. As you have described I've checked the Va and Vs, and the other voltages on the power supply an they seem ok. But on the Ysus board the Vsc and Vy aren't regular. I've tested for short all the outputs of the two y-buffer, but no fault was found. So I think the faulty board should be the ysus. Can I test the ysus without the y-buffers boards connected to view if the Vsc and Vy go on their regular values or not? Are there other tests that I can make?