Question about Sony PlayStation Portable (PSP) Console

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Change the psp firmware 4.01 to 4.01 m33

Hello, i cant change my psp firmware(4.01 to 4.01 m33).
how can i do this?

please answer soon

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  • Bradley Shaner
    Bradley Shaner May 11, 2010

    In order to go from 4.01 to any M33 firmware you will have to use "under the table" tactics that are not recognized by Sony. You should do some research on  Pandora's Battery, which will allow you full control over your PSP's firmware and give you the ability to upgrade or downgrade whenever you want to.

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  • 17 Answers

You probably need a pandora battery and a magic memory stick to change it to custom firmware.you cant do it by just updating from
sony

Posted on Sep 08, 2009

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1 Answer

I update my 3.71 m33 to 5.00 dont have extension m33 kunt 5.00


I think the best way to solve your problem is to create a pandora recovery battery...to recover a custom firmware that was running as well...create a pandora battery..You can find many tutorials in youtube...Good luck!!!

Sep 10, 2009 | Sony PlayStation Portable (PSP) Console

1 Answer

After updating my psp to 5.5 i cant see my cso files my psp can read only videos & mp3s from the memeory stick but cant see the games files thk you in advance


hi you have updated the sony psp firmware to 5.5 so thatz the firmware which will not allow you to play the games using the memory card however you will be able to play using the umd this is done to stop piracy
if you want to play the games using the memory stick then you can download the m33 firmware for psp which allow you to play through memory stick its the same sony software but has been changed a bit so that it can read the game file through memory card
i have been using this m33 driver from past 2 years and it works perfectly u can even update this driver to its latest version
hope this will fix your problem

Jul 21, 2009 | Sony PlayStation Portable (PSP) Console

2 Answers

Psp will not load ganes


Please make sure that you are running the custom firmware like 5.00m33.

Mar 26, 2009 | Sony PlayStation Portable (PSP) Slim...

1 Answer

I cant play games in my psp memory stick after i updated to 5.2


Please check you update. If your update is low, you must upgrade it to 3.52 m33 then download a firmware 3.70 m33 or higher to get the m33 recovery.
As your PSP start press SELECT and you can see a menu then go to "UMD ISO MODE" from "normal" change it to "Sony NP9660" then exit.
Now enjoy playing ISO or CSO game. Happy playing.

Jan 29, 2009 | Sony PlayStation Portable (PSP) Console

1 Answer

They say my psp does not have m33. what is m33?


m33 is a custom firmware. With a custom firmware the psp is hacked and you can download games on the psp for free. But you would need to hack it to get m33

Jan 26, 2009 | Sony PlayStation Portable (PSP) Slim...

1 Answer

Downgrade psp firmware 5.02


Someone will have to run the flash program to get you back to M33. Pandora battery and Magic stick with M33 flash on it. Most homebrew and programs will not run on any M33 version above 3.9. New UMD games from sony will have the latest firmware and the children will usually run the firmware upgrade to play the game. It will allow the new UMD to play, but the Sony Firmware will write over the Custom M33 firmware and you will not be able to run the games on your Memory stick.

Dec 30, 2008 | Sony PlayStation Portable (PSP) Console

1 Answer

Still facing problem on playing cso


ok update ur psp with a newr custom firmware ( i would say all the way to 5.00 m33-3 with 1.50 kernel addon) make sure that u have a folder in the root of ur psp mem stick that is called iso and put ur games in there.

Dec 03, 2008 | Sony PlayStation Portable (PSP) Slim...

2 Answers

How to downgrade psp v5.01 to 3.80


hi your previous psp version is 3.80 m33 if yes your using custom firmware that why you can play game to your memory stick the problem is you upgrade your psp firmware to sony official firmware 5.01 you reinstall your firwmware again using custom firmware like 5.00 m33-3 cfw below with m33 or OE

Nov 02, 2008 | Sony PlayStation Portable (PSP) Console

1 Answer

The game could not be started..


if you have slim psp upgrade it to firmware 3.90 m33 or 4.01 m33-2,to read your cso or iso files, go to the psp technician to help you to you to upgrade,because they use a pandoras battery to upgrade your psp,.you cant upgrade your psp without the pandoras battery..

Oct 05, 2008 | Sony PlayStation Portable (PSP) Console

1 Answer

GAME DOESNT START.. psp firmware 3.71m33-2


I KNOW THE SOLUTION
1. REBUTE PSP
2. GO TO CONFIGURATION CHANGE TO SONY SOMETHING...NO UMD ON UMD MODE
3. GO TO ADVANCE CONFIG.. AND ENABLE BOTH SOMETHINGS ..CANT REMEMBER
LOL IF THIS ISNT CLEAR GO ON YOUTUBE AND YOUR SOLUTION SHOULD BE THERE

Jun 16, 2008 | Sony PlayStation Portable (PSP) Console

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