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DOWNGRADE GUIDES FOR ALL FIRMWARES

Discussion in 'Sony PSP - Mod and firmware discussion' started by sicdude, Oct 3, 2007.

  1. sicdude

    sicdude Regular member

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    in an attempt to try and put an end to the countless threads about downgrading i have started this thread.

    "for downgrading fat psp's"

    for an easy to follow downgrade guide for all firmwares go here
    http://forums.qj.net/f-psp-hacks-9/t-guidethe-ultimate-downgrader-guide-90916.html

    for fimwares higher than 3.50 you will need to use the pandora battery method go here http://forums.afterdawn.com/thread_view.cfm/552549 or here http://forums.afterdawn.com/thread_view.cfm/553863 and for the easiest installer ever go here http://www.psp-hacks.com/forums/viewtopic.php?id=107553 this is the gui installer:)

    to downgrade custom firmwares back to 1.50 or repair your semi bricked psp use this 1.50 recovery http://www.sendspace.com/file/j3j2e2 put it in game folder on psp
    go into recovery mode and select run programme at psp/game/recovery/eboot.pbp

    to downgrade 3.71m33 back to 1.50 if the recovery folder is not working use this http://forums.maxconsole.net/showthread.php?p=694755#post694755

    "for installing custom firmware on the slim"
    Instalation:

    The instalation is done using pandora battery and requires a fat psp with 1.50 or
    custom firmware with 1.50 support to run a installer.
    However once the memory stick installation is done, you can use it in whatever psp slim without
    repeating the process again.

    We want to thank C+D Team for having created Pandora and having opened the path to custom ipl's,
    without which this cfw wouldn't exist.

    Steps:

    - Create a pandora battery and a pandora memory stick using the C+D team tools.
    - Run the fat psp with the pandora memory stick inserted, but with a normal battery.
    Copy the directories pandora_slim and pandora_slim% to PSP/GAME or PSP/GAME150.

    - Download official sony firmwares 3.40 and 3.50, and put them in pandora_slim directory
    with names 340.PBP and 350.PBP.

    To avoid confussion: These firmwares are used ONLY to extend the memory stick pandora kernel.
    NOTHING FROM THOSE FIRMWARES WILL EVER BE FLASHED ON THE SLIM.

    - Run the program. It will quickly extract some prx's overwrting some of the pandora memory stick.

    - Insert the pandora battery and the memory stick in the psp slim. It will boot. You won't see
    anything on the screen, because that kernel doesn't support the slim screen, but it is OK, you
    don't need a screen for the installation of 3.60 M33.

    From here, you have 3 options:

    - Press X to install M33. The process will last just few seconds, since the installer only
    needs to install the M33 custom prx's and IPL. After the process is finished, the installer
    will shutdown the psp automatically.

    - Press L+R+triangle to uninstall M33 and go back to original 3.60. Note: this can't unbrick a
    psp slim, it will just remove M33 ipl. There is currently no unbricker for the psp slim, but
    we plan on doing one in the future.
    After uninstallation, psp will be shutdown automatically.

    - Press square to dump the PSP Slim nand. Watch out: you need 66 MB of free space in the
    memory stick for this, otherwise your memory stick may end corrupted.

    This option uses the team C+D nand dumper. When the memory stick orange led stops blinking,
    the process will have finished, and you can either shutdown the psp, or use one of the two
    previous options.

    universal unbricker
    you can get it here http://dark-alex.org/ its called
    >> El Despertar del Cementerio v3<< this will install 3.71m33-2 straight to your psp

    Installation:

    - If you have already a pandora ms, don't do this part. Otherwise,
    format an ms using c+d mspformat or any other tool that allows to move
    partition to ~250kb from first sector

    Remove ms, usb and connect again usb and ms.
    Make PSP and PSP/GAME dirs.

    - Copy despertar_cementerio to PSP/GAME/

    - Download 1.50, 3.40 and 3.71 update eboots and copy them to ms root with
    150.PBP, 340.PBP and 371.PBP names.

    - Use the app under a cfw with 2.x or 3.x kernel (be sure that kernel is
    selected on recovery to the correct one (2.x or 3.x))

    - Once finished, u will have msipl.bin on root. If you already have a pandora
    ms, you don't have to do this step (ipl doesn't changes lol), otherwise,
    use c+d msinst to install ipl on ms; or use dd command from unix, or any
    hex-edit program to write on sector 16 on the physical drive.

    - Now you can delete 340 and 150 PBP's, as they won't be used more; but 371.PBP
    will be used for unbricker, so don't delete it.

    - Now you have an universal pandora ms ready to go, and you just need a proper
    battery. If you have 1.50 kernel access, use c+d tool. Otherwise, use corly149 tool.

    Battery and ms will work on all psp and slims to this date.

    Unbricking:

    - Press X to install 3.71M33.

    - Press O to install original 3.71 (rest of the process as the X option)

    - Press [] to dump nand to nand-dump.bin. When done, psp will auto shutdown.

    - Press L+R+HOME+start to restore nand from nand-dump.bin

    This proccess is very dangerous, and you should *just* use it if it's your
    last chance to get it working.

    This is a physical restore process (not a logical one), and will try to make
    a 100% exact clon of the dump.

    If you are working with a dump that isn't yours, you will get either a brick
    or a corrupt idstorage, depending on the firmware.

    If while you are restoring your psp have got any damaged block more than
    when you dumped it, you might also get a brick, depending on what block is it.

    Works for both PSP and PSP Slim.


    lets hope this thread stops most of the downgrade questions
     
    Last edited: Oct 7, 2007
  2. mperagine

    mperagine Regular member

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    Good post, should help with a lot of the questions being asked lately.
     
  3. sicdude

    sicdude Regular member

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    Thankyou ;)
     
  4. mperagine

    mperagine Regular member

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    I PM'd a mod to get this stickied. With the new PSP out and a wave of must have games, the questions will only increase.
     
  5. sicdude

    sicdude Regular member

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    very true lol,
     
    Last edited: Oct 3, 2007
  6. surfshan

    surfshan Member

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    For those of us with a Slim and no access to a PSP Fat that is homebrew - how can we get a hold of the battery. Does anyone recommend ebay?
     
  7. cee43ja1

    cee43ja1 Regular member

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    you will need access to a custom firmware fat psp. the universal unbricker can only be created with one. and there is no easy installer for one.

    @sicdude

    you should also include the universal unbricker. no psp (fat or slim) should be without one.
     
  8. marlino23

    marlino23 Regular member

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    thanks for the guide man. like mperagine said, it aughta answer all the frequently asked questions. (no more noobz asking repetitive quetions :) )
     
  9. DEVINRL

    DEVINRL Regular member

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    nice one sic, this must have took a while to post. I bet half the noobs arent even going to come across this thread and start a new one asking about this. Nice though. This is a must for a sticky,
     
  10. tansw2k20

    tansw2k20 Guest

    Does it work on the psp slim version...?
    PLease advice
     
  11. DEVINRL

    DEVINRL Regular member

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    tansw2k20>>> if you actually read a little bit of his post, you'd see that he has something for the slims. Ask something reasonable. I'm sorry but are you blind? It's the 2nd one on the list, IN RED!
     
    Last edited: Oct 7, 2007
  12. sicdude

    sicdude Regular member

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    there are two guides for the slim if you just read
    there is this one "for installing custom firmware on the slim"
    and there is this one universal unbricker
     
  13. mdsn

    mdsn Regular member

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    @sicdude
    hey man you already have 2 threads up here huh... its good man... keep it up..
     
  14. barrons19

    barrons19 Member

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    if you are on 3.71(this is for my firends psp) is there anyway to get it to 3.71 m33???

    or could i brick it, use pandora get it to 1.50 then upgrade to 3.71m33 or is that impossible as slim doesnt support 1.50 firmware i thought....

    so question is:

    1.) if you are on 3.71 on a psp slim can you get to 3.71 m33 anyway at all???

    cheers
     
  15. sicdude

    sicdude Regular member

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    you will need the pandora battery but you won't need to brick to downgrade the fat

    if you use the universal downgrader v3 it will put 3.51m33-2 straight onto both psp's fat or slim :)
     
  16. barrons19

    barrons19 Member

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    one more question i thought pspslim couldnt go back past 3.60 firmware as this is what all psp slims come with?

    so are you totally sure this will work? as its my friends psp so dont really want to break it.

    i have already successfully put my slim onto 3.71m33 so i have pandora battery already spare and memory stick.

     
  17. mdsn

    mdsn Regular member

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    @barrons19
    trust sicdude he helped a lot of people here.. but you should do it precisely.. all right?
     
  18. barrons19

    barrons19 Member

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    so is it called universal downgrader on unbricker.....?
     
  19. sicdude

    sicdude Regular member

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    unbricker but it downgrades aswell
     
  20. Camaro99

    Camaro99 Member

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    I have a slim with 3.60 firmware. Would it just be easier to pick up a downgrade kit from ebay and apply? I don't have access to a fat psp.
    Also, do I then just use devhack to load the isos?
    Thanks
     

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