Three Red Lights (Ring Of Death) | XBox 360 has been fraught with complaints from consumers due to high failure rates, which are estimated to range between 5 and 35 percent depending on the source.
Similar to the infamous "blue screen of death" (BSOD) that indicates problems with a PC, Xbox failures result in a "red ring of death" (RROD) indicated by the presence of three flashing red lights that appear when a user attempts to turn on the console. Three flashing red lights is an indication of a hardware problem in your Xbox, and it's generally related to overheating issues inside the machine.
Many people assume their Xbox 360 is gone for good when they first lay their eyes on those three flashing red lights. If your console is still under warranty, you can simply ship it back to Microsoft for repairs. If you have the three red lights and don't mind waiting, Microsoft will eventually either repair the unit and send it back to you, or send you a refurbished unit as a replacement.
Most users report that this can take up to four weeks. After the warranty expires, repair costs generally range from $100-$140
If your Xbox is out of warranty or you do not want to wait, you can try to fix it yourself. If you have tried the other methods without success, you can do your own fix for less money than what Microsoft would charge you for repairs.
Fortunately, there are Xbox 360 repair guides that can help you pinpoint the source of the problem and explain step-by-step methods for how to fix it. As well as the guarantee that your Xbox 360´s three flashing red lights will be history within 1 hour, you´ll also get full customer support from real human beings, and easy to follow video tutorials showing you every simple step of the procedure.