It seems that something about the recent system update is causing this issue for some PS4 owners when they try to put the system in standby mode (now called “rest mode”). Sony suggested that reinstalling the update might help. If you want to do that:
1. When the system is powered off, hold down the power button until it beeps TWICE. This usually takes about 10 seconds or so.
2, Connect a controller using a USB cable to navigate in safe mode.
3, Go down to the option to “update system software.” This is the third option from the top, and you need to make sure that you choose the correct option,
4. The latest system update will reinstall, and your PS4 will reboot.
Option B: Don’t use Rest Mode until Sony issues a patch - when you are done using the system use the power off option instead. In a tweet a day or so ago, Sony acknowledged that there is an issue, and they are “working to resolve ASAP, will update soon.” I don’t know how quickly they will push this out, but until they do I personally will not be using rest mode to avoid any chance of bricking my system.