Well after a year and a half from this Official Samsung UNXXD8000 Owners' Thread
it appears that my TV is having the same problem again.
When I turn the TV on the Samsung logo doesn't show anymore and the red power light at the bottom right cycles on and off a few times before the LCD shows a picture. Every week it takes it a little bit longer to turn on. The picture is still beautiful when it does come on, but I fear one day it won't come back.
Thankfully I ended up buying that extended warranty I mentioned and it will be serviced. Problem is now that this same problem has happened twice, I fear in another 1 year or so it's going to die again, and this time no extended warranty. I'll try and take lots of pictures of the insides so that maybe I'll be able to fix it myself next time. I'll keep you all posted.
And for those that wonder, yes, I have a power conditioner protecting the system, and the TV probably runs on average a half-hour each night (some nights not at all, some times 2 hours). It's primarily just for watching movies with the family.
I love the picture, but this kinda pisses me off that it won't last beyond 2 years with out an extended warranty.