Chosen Solution
I replaced power supply board and main board with known good ones. When I first plug it in the red light glows but then goes off when I try to turn the set on. If I unplug it and plug it back in the red light goes on again. No sound. No lines
@cruzer46 since you already replaced the power board and the main board, the only thing left would be either the panel or the T-con board. I start checking the t-con board according to Samsungs flowsheet No-Power.pdf
