Question about Sony PlayStation Portable (PSP) Console

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How to downgrade my psp ???

I dnt know ho to dow grade my psp how can i do this ? ?

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  • javierpr17 Apr 19, 2008

    i have a psp slim with firmware 3.90 and i cant find a program to downgrade my psp. help with that please

  • Anonymous Jul 13, 2008


    can you send me procedure on how to downgrade my psp 3.80 so i can play all games and also can watch video by not using amu......


  • Anonymous Jul 24, 2008

    i want to downgrade my psp for free.NOOOW

  • Njaija Juswiq Jul 27, 2008

    hey i have psp version 4.05 and none of iso,cso file is playable ..........if any way to downgrade or playing cso ..file .plz hep me

  • danielmarkco Aug 13, 2008

    if my system software of my psp is 4.05 how can i downgrade it

  • djr_van Aug 17, 2008

    my psp are already 4.09 version i want to downgrade to 3.90 version how can i do that

  • Dhyef Aug 28, 2008

    Hey guys, I have just bought a PSP and just do some research on the net for software update released. Got interested to upgrade to 4.09 but the problem is, I can't play my .ISO and .CSO game file. I can play it in my 3.90 version. What to do for this problem?

  • rsh_jhel Sep 04, 2008

    i cannot play the in the leathest ver.4.05

  • MuhdSulaiman Sep 27, 2008

    i got the same problem as the others. i just upgrade my psp to 4.05 and yet i can't play my games. why is that so? i hope i don't need to spend on anything just to downgrade it. pls help me...

  • MuhdSulaiman Sep 27, 2008

    i got the same problem as the others. Just upgrade my psp to 4.05 version and i can't play all of my games in my memory stick. Why is that so? I really hope there is someone out there willing to help as i need my psp badly. I also hope i don't need to spend on anything just to downgrade my psp. Please help me.

  • calvin_hong Sep 30, 2008

    i cannot play games in my psp version 4.05.........

  • tlugomo Sep 30, 2008

    what do i do when my psp tells me internal error

  • rushilbangal Oct 26, 2008

    why do i can't play games which are in memeory stick

  • Steve Rizzo Nov 15, 2008

    I know it is mostly impossible to downgrade your PSP i am so angry that if you are over version 4.00 you can NOT downgrade without paying


  • sunny5567 Nov 30, 2008

    i have a psp with firmware version 5.01 , and i seriously want to downgrade it to a lower firmware . how do i do it ?

  • Anonymous Dec 07, 2008

    i oso need it when i upgraded it all the games disappeared someone tell me what to do

  • noob12345 Dec 15, 2008

    i have the same problem can anyone tell me how to fix this i desperately need help

  • mido_ban2716 Dec 23, 2008

    what about a psp version 4.01... i need help coz i cant also play games on memory stick!! pls guys i really need your help!

  • Anonymous Dec 26, 2008

    i am running firmware 4.21 plz help! i want to play homebrew but every time i start something i get error 80020148

  • Adriel000 Dec 29, 2008

    i have my 1st very own PSP ..

    The version of my PSP system is 3.90 M33

    Then this retarded friend of mine insert an UMD and upgrade it to 4.05

    Now I cant play downloaded games anymore T_T

    I need ur help

  • Sk8R bOy Jan 07, 2009

    im on my 4th psp the rest of them were brinked i need help if you have it

  • fynriz Feb 07, 2009

    i'm looking for a way to downgrade from 4.05 to 1.5 without a pandora battery. if you know of one please email me at thank you in advance.

  • kakaroto1707 Mar 02, 2009

    my psp is an 5.02 ome or f, and this version sucks, lots of games doesn't run and my snes homebrew doesnt run too, i want downgrade it to 5.00 or 4.71 without the use of a pandora battery... plz help me!

  • kakaroto1707 Mar 02, 2009

    well my cfw is an 5.02 ome or f, and this version sucks, cause lot's of games doesn't run and my snes homebrew too i want to downgrade it to 5.00 or 4.71 without the use of a pandora battery, plz help me, or add me in the MSN messenger,

  • Anonymous Mar 12, 2009

    I want to downgrade my psp from 5.03 without a Pandora battry!!!

  • kengkoy10 Apr 04, 2009

    i just bought a psp 3000....its version is 5.01...i need to downgrade it to 3.09.....any help there????

  • changaustin Apr 05, 2009

    I accidentally ugraded my psp 3.02 to 5.01. And now, I can't play my downloaded psp games again! :'( PLEASE HELP ME!

    For exchange, I will give you some ecxellent websites that provides things for free

    FREE GAMES DOWNLOAD(psp,nds,pc,ps2,ps3,xbox360)



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  • hitmanipin Apr 07, 2009

    i have a psp 2004 and its system software is 4.01 i can't seem to put games on my memory stick! it won't work help me! please!!!!!!

  • neuBii Apr 19, 2009

    i dont know how to downgrade my psp 3000 ver 4.21. can anyone plz tell me how to do it?

  • oznerlee May 14, 2009

    I have the same problem, i accidentally upgraded my psp version from 3.71 to 5.50. I can't play my downloaded games, how to downgrade from 5.5 to 5.0?

  • Jeff Ragsdale May 11, 2010

    i am running 5.01 on a psp fat and a slim i want to downgrade to 1.0 or 1.50 so i can run homebrew i don,t know where to download the sei psp tool they told me i need also can you provide me with the link for the firmware also and anything else you need for me to know i am new to this thanks



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Dangers of downgrading

  1. Know that downgrading your PSP voids the warranty and can be quite dangerous to your hardware.
  2. Downgrading often requires upgrading: You can only use a downgrader that goes from one firmware version to another, so most users will need to update their PSP to at least version 2.0 (USA) in order to then downgrade it to 1.5 or 1.0.
Find your firmware
  1. Determine which version of the PSP operating system you are currently running:
    1. Navigate to the main menu on your PSP.
    2. Select Settings -> System Settings -> System Information.
    3. Look for System Software Version X.XX. Where X.XX is the version number of your PSP firmware.
    4. Now you will know which downloader and/or updater you will need.
      • Note that any version greater than 1.51 will prevent you from running Homebrew and other independent applications.
Use the tools
  1. Be aware that your firmware updater and associated tools are located on the Memory card.
  2. Know that there are many tools to downgrade your PSP, depending on the version number of your firmware:
    1. Version 2.0 and 2.01 can be downgraded with Easy Downgrader.
    2. Versions 3.0 to 3.03 can be downgraded [here]
    3. Search Google for other downgraders.
The .tiff image hack
  1. Be aware that the hack below is dangerous. The developers who first found this hack bricked-up (destroyed) 6 PSP units before they got it working. A single miss-step can brick your machine and make it the most expensive coaster available. Please use at your own risk. These instructions will, however, technically allow you to downgrade any PSP that can display .tiff images.
  2. Know that this process is for downgrading from 2.0 to a lower version. If you have a higher version you will need different software, and if you are running 1.51 or 1.52 you will need to upgrade to 2.0 before you can downgrade to 1.5
  3. Download the original 1.50 EBOOT updater, version 1.5
  4. Download MPHDowngrader. Be absolutely sure it is version 1.0.0.
  5. Connect your PSP to your PC via USB cable.
  6. Go to the directory /PSP/GAME/ on your memory stick.
  7. Create a sub-directory named UPDATE which must be in uppercase.
  8. Obtain the EBOOT.PBP file from the updater.
  9. Copy the downloaded PBP file into the UPDATE directory.
  10. Download the MPHDowngrader and unzip the program.
    • Inside the package you will find a Photo folder with an image inside named overflow.tif.
  11. Drop overflow.tif into your /PSP/PHOTO/ folder.
  12. Place both h.bin and index.dat in the root of your Memory Stick.
  13. Disconnect your PSP from your computer and plug in the AC adapter.
  14. Navigate to Photo and then Memory Stick via the PSP's menu system and start scrolling down through your photos until you reach the overflow.tif picture.
  15. Everything will freeze, the screen will turn black and fuzzy white text will appear.
    • If your PSP freezes without going to this black text screen, then hold the power button for about 10 seconds until the PSP shuts down, then hit the power button again to start it back up. Repeat this step until you get that black screen.
  16. Hold the power button for about 10 seconds until the PSP powers off.
  17. Hit the power button again. Your PSP will start up.
    • Navigate to your System Information, and you'll discover that your PSP thinks it is running version firmware 1.0. It isn't, gthough, and you cannot yet run Homebrew.
  18. Navigate to Game -> Memory Stick, hit the X button, and navigate to the 1.5 updater.
    • Make sure you have your PSP plugged in or the upgrade won't work.
  19. Click the X button and update like you normally would. At the end of the upgrade you will receive an error saying that the upgrade failed and to contact Sony. Ignore this and again force your PSP to power off and reboot.
    • After the PSP reboots, you will receive an error screen in multiple languages. Find your language and read the corresponding line. It notes that your preferences are lost and that you need only hit the O button to restore some default settings.
  20. Hit the O button.
  21. The PSP will start back up and you will go through the initial setup like the day when you first bought your PSP. Do so and then go to the system info pane again, where you will see that you are running version 1.5.
  22. Run homebrew at will.

[edit] Tips
  • For a new firmware version to be downgradable crackers first have to decrypt any new security or authentication measures, and then create a downloader. This can take some time and is a process of constant change as new versions are released. If you attempting to downgrade a fully updated or brand new PSP you will need to work with the latest version of the firmware, current version 3.5 in the USA.
  • Downgrade Your Psp to Version 1.5 just Using Your Psp Battery

[edit] Warnings
  • There are many web sites out there that will sell you videos or instructions, but beware, the information is available and the tools needed are free or shareware.
  • Do this at your own risk. This technique was created by modders and might not be 100 percent reliable. It may also void the warranty for your PSP.
  • Anti-virus scanner and software will often identify PBP as potentially malicious. You may need to temporarily disable these security measures to obtain the updates.

[edit] Things You'll Need
  • PSP
  • USB cable
  • Microsoft Windows ™ computer with usb support
  • Internet connection

Posted on Mar 26, 2008

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Plzz tell me how to downgrade my psp 4.21 version

Posted on Nov 25, 2008

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The easiest thing to do is buy a Pandora Battery (~$10). Then you need a Magic Memory stick which you can easily make (type it on YouTube). And you can downgrade any Firmware, and it automatically installs custom firmware, which you can play ISO/CSO games!

Posted on Jun 29, 2008

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Tenzie there are much easier ways and much more support out there than I can give you here.

send me an email here :

I will not try to sell you anything at all. But I can give you lots of support :)

What firmware are you on at the moment dude?

Posted on Apr 12, 2008

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Where can i get a downgrader or padoras battery?

Posted on Jan 14, 2009

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Posted on Oct 10, 2008

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Ok, the 1st response is WAYY to difficult. you can buy or create a Pandora battery/ Datel tool battery.

Posted on Jun 01, 2008

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