Hello, my name is carlos, I am new in this forum. I am sorry if I am not doing the right way to post over here. Please let me know if is wrong in that way I try no to do it again or let me know the correct way to do it. I have a dell plasma tv with no sound and no picture. I replace all the boards, but main logic board and the tv still no sound and not picture. When I replace the power supply board the tv work for about 2 weeks, but after I had lines on the bottom of the tv, so I ordered the y-sustain board, nothing the lower and upper boards, etc. still nothing. If you need more info, please...