You must solder wires directly to the PS4 motherboard's Syscon chip and Sflash chip.
: Locate the Serial Flash Memory (NOR) chip and the Syscon chip.
: Version 9.00 utilizes a kernel exploit triggered via a specifically formatted USB drive. ps4 downgrade 13.02 to 9.00
The Reality of PS4 Downgrading: Can You Go From 13.02 to 9.00?
Is it possible to downgrade a PS4 from firmware 13.02 to 9.00? The short, definitive answer is You must solder wires directly to the PS4
When you updated to 13.02, your previous firmware (potentially 13.00) moved to the inactive slot. The Catch: You can only revert to the firmware that was installed immediately
Understanding the PS4 Downgrade: Is Reverting 13.02 to 9.00 Possible? The Reality of PS4 Downgrading: Can You Go From 13
Firmware files are cryptographically signed by Sony. You cannot modify the update file to trick the console into thinking version 9.00 is actually version 13.02. The Only Workaround: Reverting (The Hardware Method)
If your goal is to wait for a potential future software exploit for 13.02, disconnect your console from the internet immediately. Turn off "Automatic Downloads" in your system settings. A lower firmware version always has a higher statistical chance of receiving a public exploit than a newer one. Summary Warning
The core of this security system is the , a small, encrypted processor soldered directly onto the PS4's motherboard. Its job is to maintain a secure, internal log of the console's "firmware history." As a Reddit user aptly put it, this chip acts like a "kill switch" for downgrading.
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