Factory Service Mode

What is it

The PlayStation 4 can enter a special "Service Mode". When it does so, the bottom right corner of the screen has a red translucent rectangle with the words "F a c t o r y /Service Mode" inside of the rectangle. This mode is used by Sony for repairing assistance.

What Selfs does it use?

See | Factory Service Mode Selfs

How to enter it

In a similar fashion to the PlayStation 3, one can enter FSM by patching the Syscon EEPROM (unknown values). There also may be a way to enter FSM using USB. There are documented cases of Sony repairing services accidentally leaving PS4 consoles in FSM.

Features

Unknown, supposedly more restricted than the PS3 FSM.