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December 28, 2012 // 3:43 am - Nearly two months after the previous update, today I have posted a guide and video on how to downgrade a PS3 4.31 OFW console (including CECH-300x slims) to 4.30 Rogero v2.03 CFW using a PS3 Hardware Flasher with no 3.55 needed.

Very easy tutorial. Follow the steps to downgrade a PS3, but when you get to the first step of the USB downgrading part after putting your PS3 into service mode, use Rogero 4.30 CFW v2.03 on the root of the USB with the lv2diag.self to downgrade instead of the 3.55.

So again, no 3.55 ever touches the PS3 during this whole setup! Doing this will also now allow CECH-300x models original slims to be downgraded to 4.30 CFW as long as it never touches 3.55

The whole reason for this was to find out if the E3 fits a CECH-400xx model super slim models, but all I needed was proof that you can downgrade from 4.31 to 4.30 CFW with a flasher.

So if any one out there has an E3 and a new super slim model please test this if it works! You can make back ups of the NOR incase it fails.

Here is proof you can but I still do not know if the CECH-400xx models are compatible since I do not have one.

Files needed for safety and to proceed:


PS3 USB links after NOR editing:


E3 back-up checks links:


Steps:

  • Step 1 - switch pup's with Rogero's 4.30 CFW v2.03 - my link has it set ready
  • Step 2 - lv2diag out of factory mode
  • PS3 nor dump patcher to fix bad back-ups
  • downgrade.bin - makes it rewrite the nor to allow factory mode access
  • update.bin - its the Samsung version of the flasher firmware, allows multi-console downgrades.. more than one console in other words
  • PS3 Flowrebuilder - decrypts the backups to look and make sure its good

Here is proof of me downgrading to 4.30 CFW no 3.55! My video is not cut but speeds up through the middle since it takes almost 2 hours to prove this. You see every time I drop the camera, fix the E3 and finish the downgrade straight to 4.30 CFW Rogero v2.03 which you will know it's spoofed to 4.31, you can see the install PKG / lastGAME icon after downgrading.






Hint: The E3 always has the ribbon starting under the NOR words (pictured below).

Always test your back ups and even use Flowrebuilder 4.2.2 to reverse decrypt to make sure your back up was good.


Video: PS3 4.31 OFW to 4.30 Rogero v2.03 CFW with Flasher Guide

Video: PS3 4.31 OFW to 4.30 Rogero v2.03 CFW with Flasher Guide

Video: PS3 4.31 OFW to 4.30 Rogero v2.03 CFW with Flasher Guide

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#114 - peddy - January 2, 2013 // 11:14 am
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Is this finally working on cech-3004b. akimazaki confirmed that this is working on his cech 300x, but some of you think that it's not working anyway. What is right?

#113 - technodon - December 30, 2012 // 9:41 pm
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had another look at this and need to test some stuff on my old console but i think the fail0verflow cospkg doesnt work on new consoles because i took 4.31ofw coreOS and made no modifications i just repacked it with the cospkg tool and flashed my console and it turns off. so if this method works on my old console then sony stopped the cospkg tool working somehow. anyway i will look at this next year

#112 - BluRay - December 29, 2012 // 5:55 pm
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A method to install CFW directly on 3.55+ OFW is pretty much impossible as it requires the private keys. We got lucky once, but that was easily patched and I really doubt we will get lucky again, I mean, Sony just can't be that stupid. There are quite a few cryptography methods that been release on the 80s and still haven't been hacked, so uhmm.... Don't wait for a miracle. I don't think getting a flasher now is wasting money.

#111 - technodon - December 29, 2012 // 3:44 pm
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i had another go at putting a custom firmware onto a newer 3000x series console this is what i learned. sony added a 2kb file called lv0.2 inside CORE_OS_PACKAGE.pkg in newer firmwares 3.60+ and it is checked by metldr.2 which is what new consoles have. this prevents downgrades and verifies the integrity of lv0. until we can decrypt and resign lv0.2 flashing different coreOS onto the console is not going to work!

#110 - tigereye - December 29, 2012 // 12:17 pm
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i am agreed with elser1 then open your ps3 na wait for some easy step or hope to get CFW for OFW 4.31 where you no need for downgrade etc...

just to mess up with your working ps3 then break it like wasting your hard earn money for nothing so ya thanks but no thanks... it is just my opinion.

#109 - elser1 - December 28, 2012 // 8:23 pm
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that fact you still need a flasher makes it nothing new. good work though man!

#108 - alchybear - December 28, 2012 // 7:10 pm
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lol i'm done bricking my console for the time. i guess i'm just going to wait until they fix this metldr.2, i even took the back up of a different slim ps3 on cfw rogero and pasted them over on the 3001, just another brick. its been almost a year now i believe and still no fix for this to be able to downgrade?

i only thought it was just the lowest firmware downgradable to not a metldr trouble. well i hope some one can fix this on these newer models. other than that my tutorial is good for all the older slims and phats to just downgrade straight to 4.30 rogero with out 3.55

#107 - technodon - December 28, 2012 // 2:14 pm
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make a backup of your console nor data and keep it safe, then download this and open both the download and your nor dump in a hex editor copy and paste the whole thing twice, once at offset 0c0010 and again at 7c0010 then save and extract with flow rebuilder everything should be fine then you will have made your console nor backup have rogero 4.30 coreOS

http://www.sendspace.com/file/y8ukxx

its been tried and tested by me, it doesnt work and will brick your console but you can recover by soldering the tristate wire and flashing your original 4.31 backup

#106 - alchybear - December 28, 2012 // 1:20 pm
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i now have the core_os_package.pkg extracted.

i used flow to byte reverse the backup and i should just copy the whole core_os and paste write using hxd stating from 0c0010 and again at 7c0010,? after that i can save & reverse it back for e3.

there might be if this works from what technodon is having me try.

#105 - OGFRAKISTAN - December 28, 2012 // 12:55 pm
OGFRAKISTAN's Avatar
so guys in short... No CFW for cech 3k models on OFW 4.31?