if your question refers to the 1 green light then your xbox is telling you that 1 remote is connected to it
Call 1-800-4-my-xbox
It has a ring, but if theres more than 1 ring that's bad your disc is scratched, make sure your xbox 360 is not tilted while playing.
Get a Ps3
You buy a new xbox
means hardware failure
It is more commonly known as the "Red Ring of Death", and occurs on the Xbox 360. It's a system failure, and has a 33% chance of occurring on your system. But if it does happen, call 1-800-4-MY-XBOX (1-800-469-9269) and they will walk you through the process on how they can repair your console.
Call Xbox and get it repaired!
The Xbox WHAT? They haven't come out with that yet!
You get a cooler for the back of the xbox
xbox over heating
Call 1-800-4-my-xbox, they will help you with your problems.
http://editorials.teamxbox.com/xbox/1651/The-Red-Ring-of-Death/p1/