If you're still experiencing the Xbox One black screen error, then consider performing a factory reset in safe mode. Here's how.  1. Press and hold the "Power" button.  2. Disconnect all cables and wait for 30 seconds.  3. Now, reconnect the main lead and turn on your Xbox One.  4. Go to settings and select the "console info" option under the system menu.  5. Select Reset Console > Reset and keep my games and apps.