Before you start freaking out, if you want the simplest solution is one that can actually make your Xbox 360 RROD to go. All you need to do is to turn off the Xbox power cord, and then allow it to reboot. It only takes a few minutes and you never know, it just might do the trick.
If your Xbox is a problem because you were exposed to a lot of heat, you may need to fix the motherboard as it is likely elastic. Still, though, with the right advice, you should be able to repair themselves. You can find many online resources that provide information on how to repair Xbox 360 RROD. Just search on Google can give you enough videos and articles.
