So I was playing the 360 fine for 5 hours and so. I turned it off and did something for 30 minutes. After those thirty minutes, I came back, pressed the power button on the 360 and found that the 360 wasn't powering up the 5 lights it always shows. It boots up fine. Later, I try to sync my controllers and none of them work. thing is, the 360 is still powering up and shows the start screen, but it won't connect with anything. I still have the warranty if any of yuo think I should send it in.....for the third time :/
So none of the lights on the console power up, even the middle power light? If so it sounds like your RF board somehow got fried or a connection malfunctioned. It's easily fixed by replacing the board (they're about $15 on ebay) but if it's under warranty then sending it to MS would be recommended.