: You can only revert to the immediate previous version. If your PS4 was updated to 9.03 and then you reinstalled 9.03 (e.g., via a new hard drive), the backup slot likely also contains 9.03, making a downgrade to 9.00 impossible.
Here’s the short and direct answer:
You can only go back to the immediate previous version. If you went 9.00 ➔ 9.03 ➔ 9.05, you can only revert to 9.03. 📋 Equipment Needed downgrade ps4 903 to 900 fix
The PS4 motherboard contains two "slots" for firmware: one active and one inactive. How it works : You can only revert to the immediate previous version
Use software like Wee Tools to "patch" the Syscon data. This tells the PS4 that the current 9.03 firmware is "corrupt," forcing it to fail over to the previous 9.00 slot. If you went 9
on any retail PS4 (except via a hardware flasher and soldering, which is risky and expensive). Firmware updates are designed to be irreversible once installed.