Factory/Service Mode
If you are wanting to put your console into factory/Service mode for downgrading firmware 3.55 -3.41 -3.15 you need this Teensy usb development board. The main purpose we use this if you are wanting to change your dvd rom drive board if yours has become faulty and can no longer read disks even after changing laser. After downgrading to 3.15 you will be able to swap your whole drive with another and remarry the drive key.
These are blank and need to be flashed.
Update: These now can be used to downgrade from Sony 3.70 OFW to 3.55 CFW.
