Downgrade 3.71M33 to 1.50 without pandora

[steve_o1994]

dude would u know y mine says corrupted for the psp downgrader

[marvzxd]

[QUOTE=wraggster;524201]News/release from Samhain;694755:

This is how I've downgraded my FAT PSP with CF 3.71M33 to 1.50 Original FW:

* Copy the entire content of the attached file to PSP\GAME folder.
* Rename Original FW 1.50 file to UPDATE.PBP and copy it to PSP\GAME\UPDATE folder.
* In the Game menu launch "Update to X.Y.Z."
* Follow the onscreen instruction and it's done in a while.

I got a FAT PSP with motherboard prior to TA082. I've no responsibility if you damage your PSP with the above procedure.

Works on TA-079 and TA-082

IVE DONE ALL YOUR GUIDE BUT WHEN I LAUNCH THE UPDATEXYZ IT SAYS >>> THE GAME COULD NOT START (80020148) PLS HELP ME WITH IT THNX ALOT

[cgrin2049]

you are a god.
i couldnt thank you enough
Ive been wanting t get rid of 3.71 M33-2 since the day i got it.
i was afraid to downgrade because of all the bricking that was going on due to people trying to downgrade.

BUT THIS WORKED!!!

THANKS SO MUCH

[bbk73]

worked like a charm thanks alot.

[cicciov12]

Hi, I'm new to this and was just wondering if someone could help me out. I've had a psp since the day it launched in the U.K and have been able to maintain the 1.50 firmware. However the latest Roms won't play with Devhook, fastloader etc..

So I upgraded to that new custom 3.51. All my roms work fine, but before, whenever I restarted the psp it would always revert back to 1.50. This time it seems stuck on 3.51!!

Not a problem as it still plays all my games, however I was wondering if someone could explain to me what has actually happened to my psp, and if I have lost my 1.50 firmware forever????

Thanks.

[dave123122]

ok
i tried running this and it said (after the psp start up and a short black screen) that the game could not bestarted. I have a t-082 mboard.
What should I do?

[my-o-my-what-a-mess!]

Hello, I'm new to all of this psp stuff. I'm at firmware 3.71 sony upgrade. Is that different then the 3.71 m33 ? and if so how can I get it to 3.71 m33?

[Safari Al]

yes it is different. Dont upgrade anymore. Wait until you can get your hands on a pandora battery. most likely on ebay

[checkah]

Worked perfectyl for me!! AWESOME!
Thank you very much!!

[grahamman]

Every time i try to do this i get this error message... "the game could not be started. (80020148)" Its pissing me off cause i want to downgrade for hacking