Downgrading your PS4's firmware can potentially brick your console, rendering it unusable. Proceed with caution and at your own risk. Additionally, exploiting or modifying your console's firmware may void its warranty.
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The PS4 motherboard utilizes a non-volatile memory chip called the . This chip tracks the highest firmware version ever installed on the console. If you attempt to install an older firmware file (.PUP) via a USB drive, the system checks the syscon value, detects an unauthorized rollback attempt, and blocks the installation with an error code. The Revert Method Downgrading your PS4's firmware can potentially brick your
: Used for reading and writing the console's NOR/NAND flash memory. The text on the screen continued typing itself
A hardware programmer (such as a Teensy++ 2.0 or a Raspberry Pi). Fine soldering equipment and wires. A computer to run the flashing software. 2. Dumping the Chips