Ensure your PC and PS4 are on a stable power source. A power flick during a Syscon write is fatal.
⚠️ Modifying system firmware carries a high risk of "bricking" your console, rendering it permanently unusable. ps4 tool downgrade v1 00 install
You can typically only downgrade to the "previous" firmware version stored in the backup slot or the factory firmware. Ensure your PC and PS4 are on a stable power source
Connect your flashing device (Teensy/ESP32) to your PC. Ensure the correct drivers are installed so the PS4 Tool Downgrade software can recognize the serial port. 2. Backup Your Current NOR/Syscon You can typically only downgrade to the "previous"
Launch the application on your PC. Select the "Downgrade" tab and load your target firmware PUP file. The tool will patch the core files to bypass the system's version check. 4. The Installation Phase Put your PS4 into Safe Mode. Plug in the USB drive containing the patched firmware. Run the "Install Update" option.