Downgrade 3.71M33 to 1.50 without pandora

[oleglyan]

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

Curious very Curious, Download and Give Feedback Via Comments

Dude! i've breaked my psp slim
but thank tou god that i already had pandora slim and magic memory stick and had nund-dump.bin file

i wanted to downgrade 3.71 M33-4 to 1.50 kernel

i've ned this because i have clients who want versions like 2.60 and e.t.c.

but my MMS and Pandora slim battery only installs 3.71 M33-2

[TazJGC]

Could this be used to downgrade from 3.90 M33 to 1.50? Maybe replacing the 3.71 files with the 3.90 files? Maybe? In theory?

[SkyscraperXD]

@TazJGC
The answer: NO. Sony changed the NIDs and stuff of all the homebrews and etc, so the devs needs to make a new downgrader.

EDIT: Haha... very funny. Error code DADADADA. Apparently, my psp (TA-82) think this is a offical update or something. What now?

[PaulMacC]

I made a pandora last night haha!

[Hicksterman]

Where is Original FW 1.50 file? I am totally new to this kinda thing. I just bought a psp but want to play games from mem stick.

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

Curious very Curious, Download and Give Feedback Via Comments

[q-tips]

Thank U Soo Muchh

[grudge909]

Yeah this is all well and good but i dnt get the 2nd bullet point. i cant find the FW 1.50 file anywhere in the one i downloaded from ur post. plz help

[latin_omega]

If anyone in fort worth tx want to downgrade my psp to custom firmware email me at [email protected]

[YnGunzz]

yo my psp wont turn on any more!!!! help

[steffjr]

I try to downgrade from 3.71 to 1.5. But I do not know where I can get the original firmware 1.50, in order to rename it as stated.
May you help me?