There are a few reasons why your PlayStation 4 may turn off by itself. One reason could be that there is something wrong with the power cord. If you have an older model, it might not have a C-shaped connector, which means that the plug is different in each direction. Make sure to check the power cord for any signs of damage or wear before using it again. Another reason could be that your PlayStation 4 is not getting enough power. Try turning it off and on again, orplugging it into an outlet with more power than your current one has. If all of this doesn’t work, you might need to get a new PlayStation 4 or update its firmware.