Xbox won't turn on after flashing

The problem of this matter may not really be the Xbox itself, it could be the wall socket the Xbox is connected to. If it's not so, then the video cable of the console has to be inspected to ensure it is put in place. If the video cable is fine, then you can reset the internal power supply.
Follow these steps:

  • Unplug the power cord from the console.
  • Wait 10 seconds.
  • Plug the cord back into the console
  • Press the Xbox button on the front of the console.

If this did not help, then go ahead and visit http://support.xbox.com for any help.