If you haven't soldered before, you may permanently damage your console.
now supports versions up to 11.00. You may not even need to downgrade to 9.00 anymore to enjoy homebrew. Check your previous version: If you are certain your previous version was 9.00, look into the Modded Warfare guides on Syscon Reverting. downgrade ps4 903 to 900 fix
Unless you are comfortable soldering and your last version was 9.00, the best "fix" is to use the newer PPPwn exploit on your current firmware. for your current firmware instead? If you haven't soldered before, you may permanently
The most common cause of failure is incorrect folder naming. The PS4 is extremely picky. If you haven't soldered before
The PS4 motherboard contains two "slots" for firmware: one active and one inactive. How it works