XBOX 360 flashing red when turned on, not working

if that happens make sure all the connections in the back of your xbox 360 are connected and if it is still flashing red its probably the red ring of death and thats were three rings are flashing red so if its like that your going to have to send your xbxo 360 into microsoft

http://ezinearticles.com/?What-Do-Xbox-360-Red-and-Green-Lights-Mean?&id=1981493

hello.
CAUSE The three flashing red lights may indicate that your Xbox 360 console has experienced a hardware failure. Please read the letter that discusses warranty changes for three flashing red light hardware failures. 

MORE INFORMATION 

If you suspect that you are experiencing this issue, you can submit a console-repair request online. However, before you submit your request, we ask that you first try the following two steps to verify that you are indeed experiencing this issue: 

1. When you turn on the console, examine the light on the power supply. The power supply light should illuminate green even if the three lights on the Ring of Light flash red. If the power supply light is not green, please follow the steps that are listed in the following Microsoft Knowledge Base articles: 

906101 Xbox 360: The power supply light is red 906102 Xbox 360: The power supply light is orange 906103 Xbox 360: The power supply light is not illuminated 

2. Turn off the console. Wait 10 seconds, and then turn on the console again to see whether the symptom occurs again. If your console continues to display the three flashing red lights, your console may have to be repaired. For information about how to start the repair process online, please visit http://www.xbox.com/support, and then click Console Repair in the upper-right section of the Web page. 

Note: The online console repair service is currently not available in all countries or regions. 

If you would rather contact Xbox Customer Support directly, please visit http://www.xbox.com/support/contact for information about how to do this. 

APPLIES TO 

* Microsoft XBox 360 Video Game System 
* Microsoft Xbox 360 Hard Drive (20 GB) 
* Microsoft Xbox

3 Red lights problem is a drawback of Microsoft Xbox 360
Check out the blog post at http://www.fix-xbox360.info/2008/08/23/xbox-360-red-light-fix/ to know more information on fixing your xbox

Three of the lights on the Ring of Light on the front of your Xbox 360 console flash red View products that this article applies to. if (!loadTOCNode) {var loadTOCNode = function(){}} Expand all | Collapse all if (kb_page_object) { kb_page_object.kb_imageExpandHoverText = 'Click to expand this image'; } SYMPTOMS Three lights flash red on the Ring of Light (RoL) on the front of your Xbox 360... loadTOCNode(1, 'symptoms'); Three lights flash red on the Ring of Light (RoL) on the front of your Xbox 360 console. The upper-right quadrant light is the only light that does not flash red. Back to the top CAUSE The three flashing red lights may indicate that there is a hardware problem with... loadTOCNode(1, 'cause'); The three flashing red lights may indicate that there is a hardware problem with your Xbox 360 console. Back to the top MORE INFORMATION If you are experiencing this problem, you can submit a console-repair request on... loadTOCNode(1, 'moreinformation'); If you are experiencing this problem, you can submit a console-repair request online. However, before you submit your request, first try the following two steps to verify the problem:

1. When you turn on the console, look at the light on the power supply. The power supply light should illuminate green even if the three lights on the Ring of Light flash red. If the power supply light is not green, please follow the steps in one of the following Microsoft Knowledge Base articles: 906101 (http://support.microsoft.com/kb/906101/ ) Troubleshooting your Xbox 360 Power Supply when the light is red 906102 (http://support.microsoft.com/kb/906102/ ) Troubleshooting your Xbox 360 Power Supply when the light is orange 906103 (http://support.microsoft.com/kb/906103/ ) Troubleshooting your Xbox 360 Power Supply when the light is not illuminated
2. Turn off the console. Wait 10 seconds, and then turn on the console again to see whether the problem re-occurs.

If your console continues to display three flashing red lights, your console may have to be repaired. For more information about how to start the repair process online, please visit http://www.xbox.com/support (http://www.xbox.com/support) , and then click Repair your console in the upper-right part of the Web page. Note Online console repair service is currently not available in all countries and regions.If you want to instead contact Xbox Customer Support directly, please visit http://www.xbox.com/support/contact (http://www.xbox.com/support/contact) for information about how to do this.

SYMPTOMS Three lights flash red on the Ring of Light (RoL) on the front of your Xbox 360... loadTOCNode(1, 'symptoms'); Three lights flash red on the Ring of Light (RoL) on the front of your Xbox 360 console. The upper-right quadrant light is the only light that does not flash red. Back to the top CAUSE The three flashing red lights may indicate that there is a hardware problem with... loadTOCNode(1, 'cause'); The three flashing red lights may indicate that there is a hardware problem with your Xbox 360 console. Back to the top MORE INFORMATION If you are experiencing this problem, you can submit a console-repair request on... loadTOCNode(1, 'moreinformation'); If you are experiencing this problem, you can submit a console-repair request online. However, before you submit your request, first try the following two steps to verify the problem:

1. When you turn on the console, look at the light on the power supply. The power supply light should illuminate green even if the three lights on the Ring of Light flash red. If the power supply light is not green, please follow the steps in one of the following Microsoft Knowledge Base articles: 906101 (http://support.microsoft.com/kb/906101/ ) Troubleshooting your Xbox 360 Power Supply when the light is red 906102 (http://support.microsoft.com/kb/906102/ ) Troubleshooting your Xbox 360 Power Supply when the light is orange 906103 (http://support.microsoft.com/kb/906103/ ) Troubleshooting your Xbox 360 Power Supply when the light is not illuminated
2. Turn off the console. Wait 10 seconds, and then turn on the console again to see whether the problem re-occurs.

If your console continues to display three flashing red lights, your console may have to be repaired. For more information about how to start the repair process online, please visit http://www.xbox.com/support (http://www.xbox.com/support) , and then click Repair your console in the upper-right part of the Web page. Note Online console repair service is currently not available in all countries and regions.If you want to instead contact Xbox Customer Support directly, please visit http://www.xbox.com/support/contact (http://www.xbox.com/support/contact) for information about how to do this.

Assistance by phone seven days a week.1-800-4MY-XBOX

2 red lights flashing is'nt too bad of a deal. just reposition your xbox 360 to a place where more airflow can get to it. plus, dont have anything that gives off heat near the xbox 360, thats vary important to give it room for cool air. it worked for me

send it back to microsoft for repair cos it will go again on you i can guarantee that,mines just gone in for its second repair steve jones uk

It seems the power supply of your console has gone bad. Kindly have a local cartified technician check your Xbox ASAP.