Have you taken the DM board out and looked inside the assembly to see if there are 4 capacitors all together that have swollen tops? If not, you really cannot say the DM board is not your problem. I have a how to do with pictures I will forward to you if you leave your e-mail address. If you want you could send me a copy of the service manual at email@example.com, let me look at the situation and we can proceed from there.
"Those who do not know their opponent's arguments, do not completely understand their own".**For complete TV repair kits including parts goto www.TvRepairKits.com