Dear Escobar, I read you facing problem, Its because of processor getting hot suddenly with heavy processing. It can be fixed by cleaning all air path and cooling fan. and use extra cooling fan from out side it will help you to keep your ps4 getting heat up fast.
Dear Polo wood, I had read you written long story. its exactly the problem related to some software crash. it can be fixed by ROM file (Firmware Replacement). If still Can On the Phone just Back up ur data or just try to to update new firmware without ROM erasing (updating). All the best friend
Dear Mark, I had Read your issue, that i can understand that your phone is trying to boo,but not getting files from storage. its means some file missing or some files corrupted you can fix it by re flash firmware (ROM). If you flash ROM you will lost your old data but you will can recover phone to proper working condition
Dear Thompson, Now a days many of user experiencing the same issue. it can be solved easily by (1) Adding one memory card. the move some internal memory file (Phone stored personal data) to external memory. (2) Uninstalling unwanted application (3) Resetting your phone (Your data will lost). Best of Luck For any further queries you can comment here
Dear Harry, Can you check the battery is properly connected. Use other battery to check the status. it may happen 2 causes (1) not getting enough power to drive the device from battery. (Change battery if the battery not working Properly , but first check battery and mobile have proper connection) (2) the firmware missing. (flash new firmware) All the best Harry.