The fix is for users who are unable to wake their PlayStation 4s up from Rest Mode. You'll see your console constantly blinking an orange light if you're affected, and your system will be unresponsive if you attempt to power it on or press the PS button on a DualShock 4 controller.
If this is the case, Nestledrink recommends powering down the console by pressing the power button for seven seconds, then engaging Safe Mode by holding the power button for another seven seconds afterward. From there, you can select the third option on the screen that appears in order to reinstall the latest firmware update, which should hopefully fix the problem.
While the method isn't guaranteed to fix all PlayStation 4 issues, one Joystiq staffer was able to resuscitate their console by following the steps above, and confirms that their PS4 is now back in action. If your PS4 is still unresponsive, try contacting Sony support for further assistance.