You must solder tiny wires to the syscon and NOR chips on the motherboard to "dump" and patch their data.
The PS4 motherboard contains two "slots" for firmware: one active and one inactive. When you update from 9.00 to 9.60, the system installs 9.60 into the inactive slot and then swaps it to be the active one. The old 9.00 firmware remains in the other slot until the next update overwrites it. Requirements for Downgrading how to downgrade ps4 9.60 to 9.00
Downgrading a PS4 from firmware 9.60 to 9.00 is not possible through software alone. Unlike updating, which can be done with a simple USB stick, downgrading requires a complex hardware procedure known as . You must solder tiny wires to the syscon
Applications like PS4 WeeeTools are used to patch the coreos slots and switch the active firmware. Critical Risks The old 9
This process is only possible if your previous firmware version was actually 9.00. How PS4 Downgrading Works
Your console must have a specific "Renaissance" syscon chip (look for "A0" on the chip).