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PS3 3.55 to 3.41 Firmware Downgrader is Now Available!

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219w ago - Just under a week ago we reported on news of a successful PS3 downgrade from 3.55 to 3.41 Firmware, however, it ended up not being reproducible until a PS3 3.55 to 3.41 Firmware Downgrader arrived today courtesy of solidpsycho through a guide from AmazingLarry.

Download: Lv2diag_355 / PS3 3.55 Downgrade (3.41)

To quote: Here is a patched 3.41 that allows you to downgrade. I patched the info0 to 356, and I also used Warrens method to bypass the br drive during the update. I have tested this on both of my PS3's and haven't run into any problems.

3.55 Downgrade has been confirmed on both FAT and SLIM consoles.

Please note you CANNOT use these files if you bought a PS3 that came stock with FW 3.50. DO NOT DO IT. STOP NOW.


You may want to download geo's 3.55-jb and install that and blackb0x ftp if you have not, it will be very useful for the next bit.

Blackb0x FTP server 1.2: Blackb0xFTP for 3.55 FW

If you have a fat PS3 with 256MB NAND you will need to back up your dev_flash folders, as you WILL LOSE BLURAY PLAYBACK. (on my FAT model i restored the DRL1 and DRL2 files in del_flash(2?) I did get to however keep all of my signed 3.55-jb homebrew, and it all works in retail mode except of course backup managers)

If you have a Small NAND SLIM or FAT console it would be a good idea to do one or both of the following:

In the XMB perform a system backup to save installed Homebrew you may have and gamesaves etc.. to an external device (i did this with my slim and it worked perfectly, all my installed signed homebrew from 3.55-jb works in retail 3.41 now)


make a COMPLETE backup of your HDD on your ps3 using ftp, although i dont think installed packages can be moved back over simply by ftp. i only tested the first method.

And now to downgrade:

You will need a downgrader dongle, search the forums for a DIY or buy one, or get an android/iphone, or an ipod nano, etc...

1) Unplug or switch off your console and then switch back on or plug back in.

2) While still OFF connect your Jailbreak/Downgrade device and press POWER then quickly Eject, you PS3 console should turn itself off automatically

3) OPTIONAL - Turn your PS3 on to verify you are in Service Mode (you will see a big red box, you can't miss it) then turn your PS3 back OFF

4) Place the lv2diag.self (FILE 1) from the archive and the PS3UPDAT.PUP (3.41 FW) from the archive on the root of a usb device and plug into the rightmost port on your console (dev_usb0)

5) Power on your PS3 with the usb device in and have a coffee, it can take a few moments for the PUP to install, your PS3 will turn off automatically

NOTE: if your system seems unresponsive and the light just stays green for ten minutes or more you need to use a different usb stick. i've had sporadic results with several different sticks.

6) Power your ps3 back on, you should still be in service mode, check your FW version now to verify you have downgraded successfully. Turn Off

7) Remove previous archive files from usb stick and now place lv2diag.self (FILE 2) on the root of your usb stick

8) Place usb stick in rightmost port of your PS3 (dev_usb0)

9) Turn PS3 back on with usb in place, it should turn itself off very shortly after.

10) Turn your PS3 back on and go through the configuration again.

5C3B09C7FB0655D3F8852D3AAD778025 PS3UPDAT.PUP (3.41 FW)
099F33A7967F99E91C07E870FD78B3DB Lv2diag.self (FILE 1)
7A20BFDAE65EEFB47A4425DB1B52DCDE Lv2diag.self (FILE 2)

All done!

Thanks mathieulh, solidpsycho, and everyone else.

Below is a video from PSGroove (linked above) and from Quakes69:

Log: Notice "os version = 03.4100" 8 lines from the bottom.

[Register or Login to view code]

Finally, from rms: http://rms.dukio.com/?p=19
The downgrade process

Ok, so today's topic is on how the service mode updater works, and why it does what it does, and what the updater logs on /dev_usb000 mean.

[Register or Login to view code]

This means that the manufacturing_updater_for_reset.self file was started successfully, and it found a PS3 update file on the drive, and it set the polling interval so the SELF can retrieve the file using some poll() like function. Now, here's where updaters diverge. Older PS3s use NAND and newer PS3s use NOR and vFlash. vFlash is where the flash device is actually the hard disk. If vflash is enabled, you get this in the updater log:

[Register or Login to view code]

What this means, is that its creating 3 regions, 1 FAT16, that's where the dev_flash directory is, and one UFS partition, along with another raw. If you're using NAND, you'll see:

[Register or Login to view code]

What's happening here is that it's formatting /dev_flash, dev_flash2, and dev_flash3 as FAT16, and flagging the other 2 regions as ROS, both backup and current Core OS. If one uses NOR, they will see:

[Register or Login to view code]

What's happening is here that the regions on the hard disk are abstracted to the fake devices dev_flash2/3 and dev_flash, along with the 2 ROS regions. Remember, the header stays static, but the 7,340,000 byte part is replaced. ROS is never formatted. Then UPL.xml.pkg is read and then the updater enumerated which packages to install. It first starts with Package revoke, which is stored as trvk_pkg0/1 in NOR/NAND, then it updates Core OS, followed by VSH and all of the tarballs it has. Then, the updater updates the Bluray drive Revoke list which it calls "Bul-ray". Here's another place where the 2 PS3 types diverge:

[Register or Login to view code]

Here, we can see that the BD revoke list is also updated, but on NAND, since the dev_flash3 files were wiped, we have the out of sync situation. Then the program revoke list is flashed as trvk_prg0/1. On NOR consoles, the BD drive firmware is also flashed:

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After this BD firmware is also updated. Following that, MultiCard firmware is flashed, followed by Bluetooth firmware, then we see that the SYSCON is patched with the 4864 byte firmware update. Then, the updater does some postprocessing on the system to finalize firmware installation, then verifies the firmware. We then see the output of the log, the final installed system information, along with updater time:

[Register or Login to view code]

PS3 3.55 to 3.41 Firmware Downgrader is Now Available!

PS3 3.55 to 3.41 Firmware Downgrader is Now Available!

Stay tuned for more PS3 Hacks and PS3 CFW news, follow us on Twitter, Facebook and drop by the PS3 Hacks and PS3 Custom Firmware Forums for the latest PlayStation 3 scene and PlayStation 4 scene updates and fresh homebrew PS3 Downloads. Enjoy!

Comments 102

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#102 - PS4 News - 198w ago
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Bumping a thread from 4+ months ago is probably not a good idea as nobody will reply... I'm closing this old thread up now.

#101 - MAiNPRoToCoL - 198w ago
MAiNPRoToCoL's Avatar
What are the details in the DIY downgrader dongle?

#100 - moja - 215w ago
moja's Avatar
Quote Originally Posted by bcguy35 View Post
I updated my PS3 FW to geohot. My question is how do I downgrade to 3.41? Do I need to install the OFW 3.55 and then downgrade from there?

Any help is greatly appreciated.

Yes, that is exactly what I would do, from recovery mode. I prefer starting with a fresh, clean firmware before making any jumps.

Also, I have not had any freezing issues with 3.55CFW (came from 3.41JB). Again, it is possible that moving directly from one modified fw to another, without first running a clean ofw, could have contributed to someone's issues. I am only speculating, but to be comfortable I'll flash ofw every time. Happy modding.

#99 - bcguy35 - 215w ago
bcguy35's Avatar
I updated my PS3 FW to geohot. My question is how do I downgrade to 3.41? Do I need to install the OFW 3.55 and then downgrade from there?

Any help is greatly appreciated.

#98 - dyceast - 215w ago
dyceast's Avatar
Can someone please confirm, that if I backed up the "dev_flash folders", this is all I need to restore my blueray playback?

i don't really want to backup the WHOLE HDD if I dont need to?

#97 - Maihkyz - 217w ago
Maihkyz's Avatar
I need to install this in combination with backup manager to play games from my HDD??

#96 - PS4 News - 217w ago
PS4 News's Avatar
I have updated the link in the first post now: http://www.ps4news.com/ps3-hacks-jailbreak/ps3-3-55-to-3-41-firmware-downgrader-is-now-available/

#95 - TUHTA - 217w ago
TUHTA's Avatar
can someone reupload those files?? Cause the links are crashed/deleted so please...

#94 - hvacman61 - 217w ago
hvacman61's Avatar
well I have noticed that the sound quality in ps3 may have diminished some.. I play rock band a lot and noticed some very poor sound quality now. I don't know if the two are related or if that would be just a rock band issue,right now i can't get online unless i update to 3.56 I am going to wait awhile.

#93 - almoront - 217w ago
almoront's Avatar
recent updates have taken away a lot of things that i like to have that are on 3.41. certain drm movies dont play on the home theatre anymore, 3rd party accessories like my logitech wireless rumblepad dont work anymore, and 3.41 loaded my backups (sometimes with modified eboots) perfectly with hermes payload.

with 3.55 there are reports of freezing along with some games having problems and most importantly since it was released after jailbreak was out it makes me worry about what might be included in those firmwares that we might not want. we already know that lv2 patching became a real pain in 3.55.

if 3.41 works fine why fix what isnt broken? 3d bluray support is the only thing that is missing and i don't have a 3d tv.. yet.


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