Post originale di: gUru0026 ,
If with or without UPS the problem persists you can also try change power cord and check it with another power outlet if possible. If nothing of the above fix it then power supply of PlayStation 4 is probably faulty. If you are about to open the power supply BE EXTRA CAREFUL and you will need a multimeter ! I would recommend to buy a refurbished one, be careful with the model of the power supply you already have and find the same or a compatible one, there is model name on the power supply itself.