Carefully remove the top casing, power supply, and motherboard.
Opening the PS4 and soldering on the motherboard breaks all manufacturer warranties.
The PS4 utilizes a dual-slot flash storage mechanism managed by the and the NOR/EMMC flash memory on the motherboard. ps4 downgrade 1302 to 900
For attaching wires to the Syscon/UART points.
⚠️ If your PS4 was updated sequentially (e.g., 9.00 -> 10.01 -> 11.00 -> 13.02), your previous slot will only contain the version directly preceding 13.02, making a direct jump back to 9.00 via this method impossible without historic backups. Method 2: The "Syscon + Nor" Backup Restoral Carefully remove the top casing, power supply, and
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┌──────────────────────────────────────────────────────────┐ │ SYSCON CHIP SLOTS │ ├────────────────────────────┬─────────────────────────────┤ │ Slot A (Active Firmware) │ Slot B (Previous Backup) │ │ 13.02 │ 9.00 │ └────────────────────────────┴─────────────────────────────┘ ▲ ▲ └─────────── Hardware Mod Exploits and Swaps ──────────┘ The Catch: No Stepping Backward For attaching wires to the Syscon/UART points
To perform a 1302 to 900 conversion, you absolutely require:
Before attempting any downgrade, you must understand the language of your PS4.
directly from firmware 13.02 to 9.00 via a USB flash drive or software menu is impossible. Sony designed the PS4 console with tight hardware security constraints that strictly prohibit software-based firmware downgrades.
You must disassemble the PS4 completely to access the motherboard. Once exposed, you solder your hardware flasher to the points connected to the NOR chip (which holds the Sflash data) and the Syscon chip. Using your PC, you pull a literal, bit-by-bit copy (a "dump") of both chips. 2. Validating the Dumps