Barozi on 04 April 2009
E71: possibly a dashboard update error, Check below in the "Console Reset Codes" for instructions. If that does not work there is no other solution and the console must be sent back to MS for repair.
--==Console Reset Codes==--
Clear Any Failed system updates that cause the console to error.
1. With the console off, press and hold the sync up button (the small white one)
2. While holding the sync button press the power button to turn on the console
3. Continue to hold the sync button until the Console has booted up completely.
4. During the boot process the console should clear any failed updates, allowing you to use it normally.
http://www.llamma.com/xbox360/repair/Xbox-360-error-codes.htm
