One of the lights on the Ring of Light on the front of your Xbox 360 console flashes red and you receive the error code and message: “E66. System Error. Contact Xbox Customer Support"

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SYMPTOMS

The lower-right quadrant of the Ring of Light flashes red on the front of your Xbox 360 console. You also receive the following error message in multiple languages on your television screen or your display:

E66. System Error. Contact Xbox Customer Support.

The following indicator on the front panel of your Xbox 360 console repeatedly flashes on and off:

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If one red light is flashing and you receive a different error message or code than those that are described earlier or you don’t receive an error message or code, your console may be experiencing a different issue. If this case, see "References/Links."

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CAUSE

This problem occurs because of a hardware failure in the Xbox 360 console.

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THINGS TO TRY

Turn off your console, and then disconnect and reconnect all the cables. Turn on the console again.
If you have an Xbox 360 Hard Drive attached to your console, follow these steps:
1. Turn off your console, and then remove the hard drive.
2. Turn on your console again to see whether you still receive the error message.
3. If you do not receive the error, turn off your console, and then reattach the hard drive. Turn on the console again.
Note You may have to try this procedure more than one time to make sure that you only receive the error message when the hard drive is attached.
If you have an Xbox Memory Unit (MU) inserted into your console, follow these steps:
1. Turn off your console, and then remove the MU.
2. Turn on your console again to see whether you still receive the error message.
3. If you do not receive the error message, turn off the console, and then reinsert the MU. Turn on the console again.
Note You may have to try this procedure more than one time to make sure that you only receive the error message when an MU is inserted.
If you continue to experience this issue, contact Xbox Customer Service.
Note If the agent cannot help you resolve this issue, you must return the console to Microsoft for repair.

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Additional support

If the steps in the previous section did not resolve your issue, your console may have to be repaired. For more information about how to start the online repair process, please visit one of the following Web sites:

Inside the United States
http://support.xbox.com/support/en/us/nxe/LiveIDSignIn.aspx?redirectUrl=http://support.xbox.com/support/en/us/nxe/registerdevice.aspx?step=repair (http://support.xbox.com/support/en/us/nxe/LiveIDSignIn.aspx? redirectUrl=http://support.xbox.com/support/en/us/nxe/registerdevice.aspx? step=repair)

Outside the United States
http://www.xbox.com/support/ (http://www.xbox.com/support/)

Note Online console repair service is currently not available in all countries and regions.

For more information about how to contact Xbox Customer Support directly, please visit the following Microsoft Web site:

http://www.xbox.com/support/contact (http://www.xbox.com/support/contact)

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References/links

If you receive one of the following specific error messages, click the relevant article number to view the article in the Microsoft Knowledge Base:

917874 (http://support.microsoft.com/kb/917874/ ) One of the lights on the Ring of Light on the front of your Xbox 360 console flashes red and you receive one of the following error codes and message: "E67, or E68, or E69. System Error. Contact Xbox Customer Support"

927747 (http://support.microsoft.com/kb/927747/ ) One of the lights on the Ring of Light on the front of your Xbox 360 console flashes red and you receive the error code and message: "E71. System Error. Contact Xbox Customer Support"

941377 (http://support.microsoft.com/kb/941377/ ) E74 error appears when you use your Xbox 360 console

If you receive the error message but do not receive one of these error numbers, click the following article number to view the article in the Microsoft Knowledge Base:

907536 (http://support.microsoft.com/kb/907536/ ) One of the lights on the Ring of Light on the front of your Xbox 360 console flashes red and you receive the error message: "System Error. Contact Xbox Customer Support" in multiple languages

If one red light flashes and you do not receive an error message on the screen, this may indicate a different problem. For more information, click the following article number to view the article in the Microsoft Knowledge Base:

907535 (http://support.microsoft.com/kb/907535/ ) One of the lights on the Ring of Light on the front of your Xbox 360 console flashes red and you do not receive an error code or error message

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APPLIES TO

Microsoft XBox 360 Video Game System
Microsoft Xbox

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