happened to me here,but called microsoft and sent it to them and they didnt fix it i think but sent me one that worked at least (i dont think they fixed it becuase mine had a scratch on the cover)
yea i got it. but wait!!!! they made like a new thing for helping it. brand new xbox dont get it any more. just play it with moderation. dont go playing it 24 hours a day. play it about an hour and give it a rest for about half an hour. then play it again for more. sometimes turn the xbox so its standing up. let the fans get air and let the huge plug thing get air too. this sometimes helped. with mine, i bought it early but when i shipped it to them, i kept complaining and got two months of xbox free and a new game. at that time forza motor sport was new so they sent me that. its awsome!!! they give me free stuff for it!!
My older brother is smart, and opended the X-box, and put an inside fan inside the Xbox, and then put the casing back on, so that it doesn't overheat anymore, sometimes it just jams the c-d tray opener, and if it does, you just have to press it again.
It happened to me last month... I'm not even going to bother sending it in. It's obvious what they do. They give you someone else's refurbished XBox 360 that will break in a few months usually...