You guys can skip all the steps here, because all you want to do is Hard Reset.
1. Wake up your xbox by pressing the power button on the console (xbox logo)
2. Hold the power button on the console (xbox logo) for 10 seconds, or until the console makes an audible and visible shutoff.
3. Turn the xbox one back on.
Done. No messing with power cables, no fiddling with the actual controller itself. All you need to do is follow these steps in order to Hard Reset the console.