Yes, we still have a forum.
Try this? https://www.youtube.com/watch?v=zD3A9zc90lA
Have you checked if all the cables are properly connected to the back of the console? Mine would refuse to start up if they weren't.
They are intentionally dying to make way for Xbox One.
I considered getting a new model 360, but I'm going to wait and see if MS is actually releasing a tiny disc free 360 that connects with the Xbox One. If that's the case, then it wouldn't make sense to buy a new 360 when down the road the One could play 360 games.