Turn off the power of your PS4™ system completely. Check that the power indicator is not lit. If the power indicator is lit up in orange, touch the power button on the PS4™ system for at least 7 seconds (until the system beeps a second time).
Connect the USB storage device that the update file is saved on to your PS4™ system, and then touch the power button for at least 7 seconds. The PS4™ system starts in safe mode.
Select [Initialize PS4 (Reinstall System Software)].
Follow the screens to complete the update.
If your PS4™ system does not recognize the update file, check that the folder names and file name are correct. Enter the folder names and file name in single-byte characters using uppercase letters.