If you mean that all the lights turn red, this is an AV cable fault (i.e, buy a new one, or plug it back in), if there are three, then this is a general hardware failure, also known as "the red ring of death", and you should send this back to microsoft ASAP, two means that the xbox is/has overheating/overheated, and the one light is a hardware failure, but an error code will show on screen, contrary to the three red lights, where there is nothing you can do about it, you can quote the code and tell microsoft.
Chat with our AI personalities
it means somthing is not plugged in well
You should call microsoft, the number is 1-800-4MY-XBOX
it depends which light it is. top right? bottom left? it matters. usually, just a loose lead in the back of the xbox - check that the power and video cables are in nice and snug
how I fixed my xbox 360 from the red ring of death was by not playing it or turning it on for 1 to 2 days DO NOT DO THAT!!!! If you have the pro xbox (Which is just about every single 1) just unplug it and plug it back in. !PEACE!
A single red light or "Red Ring of Death" means that your console is not securely plugged into it's power supply (The gray rectangle box) or an electric outlet. If you have an E74 Error Code then your Xbox 360 console needs service, if your console still has a warranty on it you can get it repaired for free on xbox.com