Day One and there are yet some casualties (Consoles dead we meant). Some users have been reporting problems, such as yesterday’s Spanish user whose Xbox One refused to turn on. Today, the things are even worse with several cases of people who bricked their consoles while updating with the mandatory Day One update.
The image posted above showing a “E100″ error code is the result of that brick.
According to Microsoft’s Xbox One FAQ
E100 xxxxxxxx xxxxxxxx:
This indicates that there was an issue while updating your hardware, and that you’ll need to submit your console for a repair.
To submit a repair, visit the Xbox Online Service Center.
Official Source: http://gearnuke.com/xbox-one-looks-like-brick-console-update/