Have power all way to panel input, panel cold, input signal present, no display, no red light, remote unresponsive. Anything I can do to troubleshoot?
So no red status light when plugging in points to a power or main board issue.
First things first, have you measured STBY voltage from power to main? That red status light gets power from the main, but that get power from the power board obviously.
Do you hear a relay click when you first plug the TV into the wall? If you don't, its a power board more than likely. Simple fix, either replace the board or pull the board out and send it off to be fixed. Verify which board is the problem though.
Mine is 64". Are there any fuses or reset buttons on the power board that I can check first? Are there any links on how to access the board?
Yes there is a fuse on the power board. I doubt it will solve your issue. Normally more than a fuse gets damaged when it fries. No reset switch. Be careful when you open this thing and work on it. It can seriously hurt or kill yourself.