Can I downgrade my ps3 version?

No you cannot. If your ps3 out of the box has ofw 3.55 or below and only if you have upgraded that firmware to higher version, only then you can e-flash it back to 3.55. Else it is impossible. If your ps3 out of the box is above 3.55 version, there is no way that one can downgrade to 3.55 or lower.

How do you reset firmware on ps3?

Starts here8:20How to Uninstall PS3 CFW or PS3HEN | Revert to Stock OFWYouTubeStart of suggested clipEnd of suggested clip60 second suggested clipProcess you want to hold down the power button to turn on your ps3. And don’t let go until it turnsMoreProcess you want to hold down the power button to turn on your ps3. And don’t let go until it turns back. Off. Then hold down the power button yet again and release it when you hear two quick beeps.

How do I deactivate my PS3 without a system?

If you can’t access the console, it’s still possible to remotely deactivate all devices attached to your account using Account Management on a web browser. Select Console Sharing and Offline Play > Disable.

How do I wipe my PS3 before selling?

The PS3 can reformat its hard drive. Reformatting the hard drive will erase everything on it except system software which you need. You don’t need any special hardware for this- just the console, the hard drive and time. The format utility is found in settings-> system settings.

Can you update PS3 from USB in safe mode?

Procedure

1. Transfer the PS3UPDAT. PUP file to the UPDATE folder.
2. Connect the USB to your PS3.
3. Go to Settings > System Update, then Update via Storage Media.
4. Select the USB key and launch the update procedure.

How do I activate my deactivated PS3?

Starts here1:57How To Activate or Deactivate a system – YouTubeYouTube

How do I deactivate another PS3 system from my account?

Go to [Account] > [Media and Devices], and then select [Deactivate All] for the type of content for which you want to deactivate all activated systems.