E74. System Error. Contact Xbox Customer Support.
If you are experiencing
this problem, you can submit a console-repair request online by using
the links in the "Additional support" section. To confirm your console
is displaying the E74 error message, follow these steps:
- Turn off the console.
- Turn on the console.
- Verify that your console displays the E74 error message.
If your console continues to display the E74 error message, it requires a repair. For more information about how to start the
online repair process, please visit the appropriate Web site:
United States Customershttp://support.xbox.com/support/en/us/nxe/registerdevice.aspx?step=repair
Outside the United States
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
Hope it helped.