What is the “red ring of death”?
The “red ring of death” commonly refers to an Xbox 360 general system failure message indicated by three flashing red lights on the console. Console owners have reported higher-than-average system failure rates, and Microsoft has extended the console warranty to three years to cover replacement or repair of all malfunctioning systems that exhibit the three-flashing-red-lights error code.
When a Microsoft Xbox 360 console experiences a “general hardware failure”, three flashing red lights appear on the front of the console, known by gamers as the infamous “Red Ring of Death”. http://en.wikipedia.