So I came home yesterday and my PDP-4280 (less than 5 years old) will not turn on. I changed outlets and unplugged and plugged it back in, but it won't turn on. The red/blue light on the front does not illuminate at all. One interesting thing is that when I plug it in, I hear a clicking noise from the back of the TV. Any idea what this could be and how much it would cost to fix?
That sounds like a power board failure. It probably needs some electrolyte capacitors replaced. The clicking comes from the relays on the power board. Badcaps is a better place to ask these kinds of questions.
Panasonic FR caps are cheap, labour isn't . Most repair people don't do component level repairs any more and would swap in another power board sooner than replace a $1 part with a soldering iron.