[TUTORIAL] 2.71 Generic Downgrader

[Vulpix]

Tutorial written by Black_Skull, translated by KoubaK, vb_master redid banner with assistance from l337espeon.

Introduction

//After the release of the 2.71 downgrade by Dark_AleX. Now he comes and delight us with another, doing the same function, but simpler.
Now the 1.50 firmware dump becomes useless, simply, you take the EBOOT.PBP of the desire update (1.50-2.71), yes you can reinstall a clean
copy of 2.71 again, if any possible failure.

Precautions

//The Downgrade is a delicate process, since we are going to format the flash memory (flash0) of the PSP and reinstall a new firmware, so make sure you battery is fully charged, and the AC adapter is connected to the PSP.

//If your PSP has a TA-082 mobo, you can only downgrade to firmware 2.50.
DO NOT TRY TO DOWNGRADE TO A LOWER FIRMWARE.

// DOWNGRADE AT YOUR OWN RISK! Neither Black_Skull or Dark_Alex or any other person will take responsibility for any failure resulting in a brick.

Wondering if your PSP has a TA-082 motherboard?

//Simplest thing ever
Just Open the UMD Door and look if you see any numbers in the top right hand-side, look for this "IC1003". In the picture below you can actually see an example.

//If we see, in the opposite side, and under the chassis of the tray of the UMD, and with the label "IC-6001", you will be able to lower it to the firmware that you want
If not, only to 2.50.

Downloads

//2.71 Firmware Update: http://dl.qj.net/Firmware-2.71-PSP/p...8046/catid/163

//Dark_AleX's HEN D + Generic Downgrader: http://vbmaster.portablesofdoom.org/...neric_pack.zip

Available Firmwares: http://dl.qj.net/PSP-Firmwares/catid/163
1.50, 1.51, 1.52, 2.00, 2.01, 2.50, 2.60, 2.70

How To Update To 2.71

*If you already have 2.71, just skip this step.
//Simply, just download the 2.71 FW EBOOT.PBP from the link above, and place it in PSP/GAME/UPDATE (create the UPDATE folder yourself).
Now, Go to Game > Memory Stick and start the update from there.
Follow the steps on the screen to update to 2.71.

//Remember to follow the steps directly, if not, say good-bye to your PSP.

Installing the files

//Download the "hend_generic_pack.zi p" from above, un-zip and copy every file to the ROOT of your Memory Stick (where the MP_ROOT and PSP folders are).

-3 txt files (*.TXT)

-2 binary files (*.BIN)

-1 PRX (*.PRX)

-1 folder named PSP.

//Remember to overwrite the PSP and GAME folders.

//Now do not forget to do this, after downloading the firmware desired, take the "EBOOT.PBP" and rename it to "UPDATE.PBP". Then just copy the file in PSP/GAME/UPDATE folder.

Okay, Everything its done, for now, lets get this started.

Activate the Homebrew Enabler

//Connect the AC adapter to the PSP, highlight the "PHOTO" icon and press the "Triangle" then "Slideshow".

Few things could happen:

//OPTION A: The PSP freezes, just restart manually and try again.

//OPTION B: RED SCREEN. Do not scream, nothing has happened, the process just simply failed.
Just reset manually and try again. (This could happen several times...)

//OPTION C (the good one): BLUE or GREEN SCREEN: The process was a success; the PSP will automatically reset itself.

Downgrading to the desired firmware

//Make sure your battery greater than or equal to 75% charged (100% recommended), because if not, it will not start.
Go to GAME > Memory Stick and start the application.

//If your battery is less than 75%, the PSP will restart without displaying any errors (that is a bug which does not display errors). If everything goes well then it will display something like this "Doing preparations", then "Extracting special PRXs".

//After the screen will return to magenta text, and it will display if you accept the risks. By pressing "X" the process will start. It will display formatting flash, creating directories, writing IPL, and writing files and a percentage.

//When it finishes will say to press "X" again.
The PSP will restart itself and your desired firmware will be installed.

Now you can format the Memory Stick!

Video

A video of the Generic Downgrader downgrading 2.71 to 1.50.

[Hardrive]

Very nicely written, I'm adding it to THE GUIDE.

[KKlicK]

Originally Posted by Hardrive

Very nicely written, I'm adding it to THE GUIDE.

Ditto. I'll sticky it.

[sushi_kun]

hi, is there a way to downgrade from 2.71se back to 1.5? coz i upgraded yesterday and found out that 2.71se kinda sux... thx!

[Vulpix]

Originally Posted by sushi_kun

hi, is there a way to downgrade from 2.71se back to 1.5? coz i upgraded yesterday and found out that 2.71se kinda sux... thx!

Well, first you should probably work on your grammar and spelling.
Then you should read the other thread about 2.71SE-A.

[Muhu]

Originally Posted by sushi_kun

hi, is there a way to downgrade from 2.71se back to 1.5? coz i upgraded yesterday and found out that 2.71se kinda sux... thx!

Downgrade just like you were downgrading from 2.71. Read the tutorial in this very thread on how to do so.

[Fightmeyer]

Just tried to Downgrade from 2.71 to 1.5
I followed precisely the tutorial but after starting the updater/downdater it starts, than reboots and i am still on 2.71. What am i doing wrong??

[thundrestrike]

whats

Activate the Homebrew Enabler

Is this needed to do anything? I don't know what that is

please respond

[all_hail_psp]

hi, i did this and my screen is stuck at Extracting special prx's from pbp... and it wont go anywhere. has anybody else had this problem?

oh by the way thunderstike thats the HENC homebrew enabeler that he talks about.
"//Connect the AC adapter to the PSP, highlight the "PHOTO" icon and press the "Triangle" then "Slideshow".

Few things could happen:

//OPTION A: The PSP freezes, just restart manually and try again.

//OPTION B: RED SCREEN. Do not scream, nothing has happened, the process just simply failed.
Just reset manually and try again. (This could happen several times...)

//OPTION C (the good one): BLUE or GREEN SCREEN: The process was a success; the PSP will automatically reset itself."
these directions to activate the homebrew enabeler.

[Anti-QuickJay]

Thanks for the guide

[all_hail_psp]

ok so the only way i could restart my psp was by taking out the battery. i did that and now it says the game could not be started! i changed nothing, just took out the battery! maybe its because i took out the battery and put it back in...?

[Vulpix]

Originally Posted by all_hail_psp

ok so the only way i could restart my psp was by taking out the battery. i did that and now it says the game could not be started! i changed nothing, just took out the battery! maybe its because i took out the battery and put it back in...?

Try holding the power switch up longer.

[canhuck]

I get the blue screen and after that my PSP does not reboot itself and I have to manually turn it on cancelling out the effect the HEN should be having. Anyone have the same problem?

[KidCactus]

Originally Posted by canhuck

I get the blue screen and after that my PSP does not reboot itself and I have to manually turn it on cancelling out the effect the HEN should be having. Anyone have the same problem?

Yes, I have the exact same problem, and I would very much like to know what to do.

Edit: Just found out what to do. Canhuck, read the readme text file that came with 2.71 SE-A; there you will find out how to go back to 1.5 again very easily.

[kevinarjun]

This Tutorial Rocks...Thanx man...!!!

[MPIheadcommand]

Problem here,

I'm using the homebrew enabler. I get to the blue screen and then the unit shuts down and does not restart. I then start up manually and try to run the 1.5 updater, but I keep getting this message:

"The game could not be started.
(80020148)"

O to go back, which 'm able to do fine.

Also, I downloaded the 2.71 SE-A file but there's no readme file.


So what do I do?

[EagleTG]

Awesome tutorial... worked like a chimp. Banana?

[GizMo McHolla]

Well I have done everything this post said down to the nitty and all my PSP does is freeze over and over again. Whats the deal?

[Chinoxlz]

Well I tried to downgrade the custom firmware... I followed all the instructions and I get the error DADADA. So how can I downgrade 2.71 SE to 1.50??

[Vulpix]

Originally Posted by Chinoxlz

Well I tried to downgrade the custom firmware... I followed all the instructions and I get the error DADADA. So how can I downgrade 2.71 SE to 1.50??

I personally tried this, and it works fine for me! I'm not sure what you all are doing wrong.

Try launching RECOVERY from the RECOVERY menu???!!!

[T T]

Completed this, and the firmware is showing as 1.5, but I can still play GTA LCS for example. Is that right?

[gasca]

after the preparation msg it seaz could not find UPDATE.PBP. and the psp restarts

wtf welp

[L_o_N_e_R]

Originally Posted by gasca

after the preparation msg it seaz could not find UPDATE.PBP. and the psp restarts

wtf welp

you named it UPDATE.PBP.PBP

just name it UPDATE and your fine

[gasca]

Oh Whitout The .pbp?.....k Il Try Again


OKYE

WORKED LIKE A CHARM
can anyone tell me what are the musthaves on 1.50?

[Vulpix]

Originally Posted by gasca

Oh Whitout The .pbp?.....k Il Try Again


OKYE

WORKED LIKE A CHARM
can anyone tell me what are the musthaves on 1.50?

You should upgrade to 2.71 SE-B now.

[Arcanum]

I've copied the correct files, and the enabler worked, but every time I run the update, it starts extracting and then gives this message:

Error decrypting DATA.PSP

Any way to fix this, or am I screwed?

[shikensha]

Thanks for that excellent tutorial! Was a great help!

My PSP is a 1003 CW model so it came with FW v2.60. Not wanting to get a copy of GTA to downgrade, I upgraded to v2.71 using the FW from QJ.net then tried using Xtrusion's Downdater but couldn't get it to work. But then I found this great tutorial to follow!

It was pretty nerve racking to see the PSP freezing up then shutting itself off when I tried to run the homebrew enabler. But I kept trying and after about 7 or 8 tries, it worked so don't give up when you're trying it. It freezes because the TIFF exploit the enabler needs to make use of is unstable supposedly so, you basically have to be pretty lucky to get the enabler to run properly the first time.

After that, the downgrading process was successful and I moved onto installing the 2.71SE-B'' FW which also went smoothly.

Being a newbie at the whole homebrewn scene however, I was pretty confused about how to run stuff since I couldn't find anything that explained the difference between Henc and Kxploited files. Then it turns out you just have to create an "ISO" folder in the root directory and a "Game271" folder in the PSP directory.

Once you've done that, all you have to do is dump your ISO/CSO files in the ISO folder, make sure there's a UMD in the drive and then you can run them off the memory card! Simple as that! Had me mucking around for a few hours because all the tutorials I could find only covered running files with Devhook or something similar but, there's a pointer for anyone else new at this

Once again, thanks for the great tutorials!

[Squid Squid]

What the heck I copied all the folders and when I go to photos there's nothing

[Henkibojj]

Originally Posted by shikensha

Thanks for that excellent tutorial! Was a great help!

My PSP is a 1003 CW model so it came with FW v2.60. Not wanting to get a copy of GTA to downgrade, I upgraded to v2.71 using the FW from QJ.net then tried using Xtrusion's Downdater but couldn't get it to work. But then I found this great tutorial to follow!

It was pretty nerve racking to see the PSP freezing up then shutting itself off when I tried to run the homebrew enabler. But I kept trying and after about 7 or 8 tries, it worked so don't give up when you're trying it. It freezes because the TIFF exploit the enabler needs to make use of is unstable supposedly so, you basically have to be pretty lucky to get the enabler to run properly the first time.

After that, the downgrading process was successful and I moved onto installing the 2.71SE-B'' FW which also went smoothly.

Being a newbie at the whole homebrewn scene however, I was pretty confused about how to run stuff since I couldn't find anything that explained the difference between Henc and Kxploited files. Then it turns out you just have to create an "ISO" folder in the root directory and a "Game271" folder in the PSP directory.

Once you've done that, all you have to do is dump your ISO/CSO files in the ISO folder, make sure there's a UMD in the drive and then you can run them off the memory card! Simple as that! Had me mucking around for a few hours because all the tutorials I could find only covered running files with Devhook or something similar but, there's a pointer for anyone else new at this

Once again, thanks for the great tutorials!

This must have been the most serious neophyte I've seen. Continue to write this way and the forums will be much better! Thankfulness is a bliss!

Also, great that the tutorials were helpful. Were my videos helpful? I've made videos for Homebrew Enabler, SE-B installation and this very guide for downgrading. You used all guides, hope you thought my videos were helpful. If not, go screw yourself. Nah, I don't mind.

[MaTiAz]

Originally Posted by Henkibojj

Were my videos helpful?

Yes. They helped me to get over my brickphobia and finally downgrade to 1.5. Thanks for the videos, and thanks for the excellent tutorial vb_master.