How To Downgrade Ps4 9.60 To 9.00 !!exclusive!! May 2026

The Ultimate Guide: How to Downgrade PS4 Firmware 9.60 to 9.00

Why downgrade from 9.60 to 9.00?

Step-by-Step Guide:

1. Disassemble your PS4 completely to access the motherboard. Locate the NAND chips (usually near the HDMI port).
2. Solder wires from the Teensy to the test points on the PS4 motherboard (SCK, CS, MISO, MOSI, VCC, GND).
3. Flash the Teensy with the "PS4 NOR Validator" or "recovery firmware" (available on developer forums like PSX-Place).
4. Connect your PC to the Teensy via USB. Use a tool like NandPloader to dump your current 9.60 firmware to a file (backup in case of failure).
5. Erase the target sectors on the PS4 NAND.
6. Write your old 9.00 dump back to the NAND via the Teensy.
7. Reboot. The console will likely show error CE-34788-0 because the fuses are mismatched. You then need a modified 9.00 recovery PUP that disables the fuse check.