Question about Sony PlayStation Portable (PSP) Console

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Original 3.90 firmware without m33

I have 3.90original but i cant play iso files...is there anyway i caould make it to work?tnx

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  • jomat12 May 24, 2008

    tnx for the solution...keep up the good work.:)

  • neo_von_jade Mar 02, 2009

    original 3.90 firmware without m33 same issue no iso games

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  • 1,944 Answers

Hi,

You need to downgrade your firmware.

www.psp-hacks.com

has all that you need

Posted on May 20, 2008

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1 Answer

Well my psp at first had a version of 3.71(i could play iso games)... then i updated it to 6.00 (i can't play iso games)....now i want to make it 3.71 ....how is that possible?....could you tell me step by...


Hi There!
Honestly, downgrading the firmware is tedious compared to upgrading it. I would suggest you have someone who has the technical knowledge to do this. Failed downgrade could lead to a bricked psp. Which will render it useless. Some can be reflashed and will work back while some cannot.
However, you can purchase a Pandora battery for you PSP. Remember: You CANNOT downgrade your PSP with any firmware higher than 3.50 without a Pandora's Battery.
You may check this link for a self-help guide in making your own Pandora battery. This is for a PSP slim model.
http://forums.maxconsole.net/showthread.php?81424-How-to-create-a-Pandora-Battery-and-Slim-Mem-Stick-WITHOUT-a-Phat-PSP!
Hope that helps!

Feb 03, 2011 | Video Game Consoles

1 Answer

Can i run iso and cso files on my psp 3000 with firmware 5.50?


Yes but by installing custom firmware but i don't want is compatible for your psp 5.50, i know only original firmware 5.03, Here is my blog on how to install cfw gen-c and chickher r2 to be able to play iso/cso games. http://www.fixya.com/support/r7119752-install_cfw_5_03_gen_c_9_full_psp

Jan 05, 2011 | Video Game Consoles

1 Answer

Why cant play or i can not see my install the games


To be able to play ISO games, you need customs firmware. If you have original firmware 5.03. Here is the procedure how to install custom firmware http://www.fixya.com/support/r7119752-install_cfw_5_03_gen_c_9_full_psp

Dec 21, 2010 | Sony PlayStation Portable (PSP) Slim...

1 Answer

Why i cant play cso or iso games on my vre


Your CSO/ISO files should be in your ISO folder in the root of your memory stick. You might have to make this folder if you don't already have it. Also, your UMD mode have to be set to NO UMD REQUIRED, or M33 Driver. You must have Custom Firmware to play ISO/CSO games.


Custom Firmware site: pspcustomfirmware.com

Mar 21, 2009 | Sony PlayStation Portable (PSP) Slim...

1 Answer

Iso/cso won't run to PSP version 4.20


You cannot play .iso or .cso files (or any homebrew games) on your PSP unless you have firmware 1.5 or a custom firmware. Any "off-the-shelf" firmware such as 4.2 will not support these types of files. They will just show up as "Corrupted Data".

You can go through the process of downgrading your firmware from 4.2 to 1.5, then from 1.5 you may upgrade to a custom firmware such as 5.00 m33-4. Doing so would require a good deal of technical know-how and a LOT of patience. If you do not want to risk ruining your PSP, do NOT try this. Research methods of downgrading such as "Pandora's Battery" and other firmware downgraders.

You were able to download games from the PSP website because they are programmed to play on the current firmware. Even if you were to (somehow) properly convert the .iso or .cso files to an EBOOT.PBP file, it would not run unless you have firmware 1.5 or custom.

Jan 03, 2009 | Sony PlayStation Portable (PSP) Slim...

3 Answers

I cant play games on my psp v5.01 in its memery stick


IF YOU WANT TO THE OLD VERSION BACK AND PLAY AGAIN...... HOLD THE SWITCH UPWARD AT THE SAME TIME HOLD THE L AND R BUTTON AFTER THAT THE M33 RECOVERY MENU APPEAR... IF YOU HAVE SOME QUESTION JUST EMAIL AT SPONG3BOB11@YAHOO.COM

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

1 Answer

PSP won't recognize the games on memory stick


Earlier Your PSP was installed with Custom Firmware. Thats why you were able to play Backup ISO's from Memory Stick. You have now updated your firmware to Original SONY firmware  and SONY wont allow you to run Backup ISO's from Memory Stick.
If you want to play Backup ISO's again you need to install Custom Firmware

Nov 13, 2008 | Sony PlayStation Portable (PSP) Console

1 Answer

AFTER UPGRADE MY PSP CANT READ ISO FILES SO I CANT PLAY ANY GAMES


your ISO Games....
Presumably these are 'backup' of yours or others games ??
Do you have 'any' level of homebrew installed to be able to read your ISOs ??
If this is the case - you will need to revert back to the original firmware. . . if you need more detail, please comment.

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

1 Answer

Where can i find the memory card's ISO folder on my psp?


you have to have a custom firmware psp, google it if ya dont know what that is, when yout psp is on custom formware you format the memory stick and you get the iso folder on the root folder you just put the games on there using a usb cable.

Aug 15, 2008 | Sony PlayStation Portable (PSP) Console

2 Answers

Corrupted file


do u have custom firmware on ur psp. the only wy u can play downloaded iso/cso files are with custom firmware.

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

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