Power cycling your console will help you to troubleshoot performance issues, crashes and black screens. Doing this does not erase any of your games or data.
1. Power down your console. Do not enter Rest Mode.
2. Wait for the lights on your PlayStation to turn off completely and unplug the power cable.
3. Wait minimum 2 minutes.
4. Plug the power cable back into PlayStation and turn the console on.
In some cases it is also recommended to use an earlier gamesave before the issue occurred.