Facing TV Problems? Ask a TV Technician.
Welcome to the site. I'm Dan, and I'd be happy to help.
Reading over your problem, I'm a little confused as to what the problem is. Can you tell me what the original symptoms were, before you replaced the power board?
What were the original symptoms, before you replaced the board? What made you want to replace it?
Does the Tcon connect to the power board, or only the main? Have you tested the voltages after pressing the power button, or only with the TV plugged in?