Hello people smarter than me about televisions.
I have a Samsung HLR5078 that wont power up. I have read through a lot of different forums and they all talk about having a strange sound (color wheel) or the 3 blinking green dots. My TV does not make the sound or have any blinking dots. It leads me to believe there is an issue with the power supply or board, but not sure where to start. I don't want to just start shotgunning parts at it as they can start to add to to more than a replacement. Any help with helping to diagnose this issue would be much appreciated.

Chowhound
Comic Vine
GameFAQs
GameSpot
Giant Bomb
TechRepublic