Late to the party @marcussaet21868 but did you ever get it repaired? I just went through the same kind of steps (I did not find this forum earler but @oldturkey03 sounds like he really knows his onions! I'm beginning to think that the actual panel has failed... I have replaced both the T0con and main boards. I'm confident that the power board is fine - same issue as you had a while back, audio, no picture, but the backlight is working fine...