Downgrading Custom Firmware (OE / M33)

[Alphenz]

Want to go back to a previous OE revision or have decided that custom firmware is not for you? Here is how to downgrade your new OE installation in five easy steps:

• Download the Recovery folder
• Place the Recovery folder in <pspdrive>:/PSP/GAME/
• Download the 1.5 Update, save as file name "UPDATE.PBP"
• Move "UPDATE.PBP" into the Recovery folder you placed on your memory stick in Step 1
• Everything is setup! Hold R while turning on your PSP to enter recovery mode, and choose the option which reads "Run program at.." to begin downgrading to firmware 1.5.

I was told we can now downgrade ver. 3.01 to 1.50. Is this the way to do it? Thank you.

 

[Jaynb]

I was told we can now downgrade ver. 3.01 to 1.50. Is this the way to do it? Thank you.

Hi,

These instructions are for downgrading from an OE firmware not an official sony firmware.

If you are on 3.01 then you will need to follow the guide in this thread.

But in order for you to do this, you will firstly need to upgrade to sony official 3.03, and have an unpatched copy of "Grand Theft Auto - Liberty City Stories".

 

[Alphenz]

Great! Will follow your lead and hope for the best. Thank you again.

 

[Jaynb]

Great! Will follow your lead and hope for the best. Thank you again.

Not a problem. Happy to help! :smile:

 

[Fisayo26]

downgrading sony firmware to 1.50

I wanted to know if a sony firmware 3.11 exists for the PSP. If so is there a way to downgrade it to 1.50.

 

[Roe]

I wanted to know if a sony firmware 3.11 exists for the PSP. If so is there a way to downgrade it to 1.50.

Yes it does exist and no it can't be downgraded.

 

[shadowthor]

If you just got the psp, see if you can trade it for a psp with a firmware lower than 3.03.

 

[King-Wade]

sweet tutorial x3sphere, i downgraded just to see if it worked and it worked perfectly, of course i upgraded back up right away but this is definitely going in my bookmarks

 

[Cheezeball99]

Welcome to the forums, King-Wade!:smile:

 

[King-Wade]

thnx alott but uhmm anyways i tried downgrading again but when i ran the update file my screen went black and then turned off..and now thats whats happening when i run iso/cso files..andy ideas?

 

[Roe]

Check all your settings in configuration in recovery mode. See if any are different and change them to whatever you want.

 

[King-Wade]

but how would i know if they are diffirent?? i didnt really pay attention to what it was...

 

[Roe]

well firstly check that no-umd is disabled and you have a umd in the drive

 

[King-Wade]

well firstly check that no-umd is disabled and you have a umd in the drive

okay...no-umd is disabled and i have a umd in the drive..and still same problem:sad:

 

[Cheezeball99]

Try downgrading again, to 1.5 (unless it already did) and then to back to the OE.

 

[King-Wade]

i did try though and it still didnt work

 

[x3sphere]

try clearing your flash1 config: http://forums.exophase.com/showthread.php?t=1830

 

[Roe]

Maybe this will teach you not to mess with flashing. :smile:

 

[King-Wade]

thanx alott that worked and uhmm i dotn ill ever, ever, EVER mess with flashing again

 

[fixxer406]

im trying to downgrade but when i load the downgrade i just get a black screen... is it possible my psp is " bricked " and what does bricked mean