When the makers of PS Jailbreak launched their PS Downgrade USB key just a few weeks ago it was advertised to work on PS3 firmware version 3.42 “and beyond”. While the downgrade key did actually work on firmware version 3.50, Sony has just rolled out firmware version 3.55 and it’s being reported that the downgrade functionality is now disabled.

Eric Lempel, VP of Network Operations for Sony, posted about the update Monday on the PlayStation Blog. “A new PS3 system software update, v3.55, will be released soon. This is a minor update that adds a security patch,” Lempel wrote.
When those utilizing downgrade tools ran the firmware update on their consoles, they soon realized that it wasn’t a minor change for them.
“Looks like they’ve patched it… You’re still able to put the PS3 in Factory/Service mode; however, step 5 to 10 (referring to the tutorial here) is a no go. The system continues to boot into Factory/Service mode, even with the modified 3.41 PUP and the first Lv2diag.self file loaded alone on a USB drive. Fortunately the second Lv2diag.self works and returns the PS3 to retail mode. So in other words: you cannot [currently] downgrade from PS3 firmware 3.55,” said Greg from PS3-Hacks.com.
Some forum users on PSX-Scene.com back up Greg’s findings, and note that proxys are working again for the time being, but will likely be disabled again in another week once Sony has confirmed that the rollout is complete and there are no major bugs.
So, for now, those who want to run homebrew applications or backups are once again stuck with no PSN access if they choose not to install the firmware. Also, Sony will likely repeat their past move of requiring this latest firmware release in order to play future game releases. It looks like it’s back to the drawing board again for PSJailbreak and the PS3 hacker community.
14 Comments on Sony kills the downgrade hack with new PS3 firmware 3.55

2 weeks Headline: PS3 Firmware 3.56 removes downgrade functionality.
3 weeks headline: PSJailbreak releases new patch to circumvent sony firmware.
4 weeks headline: PS3 Firmware 3.57 removes downgrade functionality.
5 weeks headline: PSJailbreak releases new patch to circumvent sony firmware.
6 weeks headline: PS3 Firmware 3.58 removes downgrade functionality.
... REPEAT ....
A few months Headline: Frustrated PS3 users annoyed by constant sony updates, destroy PS3's with a big stick and buy Xbox 360's .

101 Weeks headline: Sony Entertainment implodes, then explodes, Hadron Collider is retired after Big Bang is monitored from every direction by every financial institution on Earth, rebel alliance/ewoks celebrate downfall of evil empire.
YOU NEED....
USB 2.0 IDE/SATA Connector
x2 USB flash drives
Firmware download (http://downloads.exophase.com/685/ps3-firmware-341)
Playstation OS download (http://us.playstation.com/support/systemupdates/ps3/pc_update/index.htm)
Windows Machine
So first off you will need to follow playstation OS instructions
Create a folder on the storage media in which to save the update data. Using a PC, create a folder named “PS3” on the storage media or USB device. Within the PS3 folder, create a folder named “UPDATE”.Be sure to save the update data as noted below. If the data is not saved in the correct way, the PS3™ system will not recognize the update data. The folder name must be in all uppercase letters.
Location: Save in the “PS3” folder > “UPDATE” folder
File name: Save as file name “PS3UPDAT.PUP”.
Then on another USB
Save the update data to a USB mass storage device
general, the storage media must have at least 120 MB or more of free space.
Save the data to the following location on the storage media. Using a computer, create a folder named "PS3" on the storage media. Within the "PS3" folder, create a folder named "UPDATE". Save the update data in the "UPDATE" folder.
Be sure to save the update data as noted below. If the data is not saved in the correct way, the PlayStation will not recognize the update data. The folder name must be in all uppercase letters.
Location: Save in the "PS3" folder > "UPDATE" folder
File name: Save as file name "PS3UPDAT.PUP"
Then remove PS3 hdd heres the removal instructions (http://us.playstation.com/support/answer/index.htm?a_id=362)
Then you will need to reformat hdd. (http://www.ehow.com/how_6026_format-hard-drive.html)
Then remove the CMOS battery and leave it out for about 10-20 minutes to be on the safe side, and then reinstall.
you will have to open PS3 right up to get at it and note !!! THIS WILL OID YOUR WARRANTY !!!
Then reinstall HDD in to PS3
Then install OS.
Do not turn off the PS3™ system or remove the storage media or USB device during an update. If an update is cancelled before completion, the system software may become damaged, and the system may require servicing or exchange.
During an update, the power button on the system front and PS button of the controller are inactive.
Insert the USB device that contains the update data in the PS3™ system.
From the home menu, select (Settings) > (System Update), and then press the button.
Select [Update via Storage Media] The system automatically searches for and finds the update data saved on the storage media or USB device.Start the update. Press the button to start the update. Follow the on-screen instructions to complete the update.
Confirm that the update was successful.
After the update has been completed, go to (Settings) > (System Settings) > [System Information].
If the [System Software] field displays the version number of the update, the update was successful.
Hint
Then install firmware.
Turn on your PlayStation 3 console and insert the storage media.
From the XrossMediaBar, head over to Settings and finally to System Update. Press X on your controller to move to the next step.
Select Update via Storage Media and the system will search the drive for the PUP file.
Follow the on screen instructions to begin the update. When the update is done, your PS3 will reboot and when you come back, confirm you have the firmware update. Head to Settings, then System Settings and finally System Information. If the number showing matches the update you downloaded at the beginning of the guide, then the update was successful
You can delete the update data from the USB devices after the update has been successfully completed
hmmmmm well we use the unit for more than just games so think i'll just wait till they come up with a hack that doesn't need you to go back to 3.41 firmware.
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