PSP V2.0 to v1.5 Downgrade guide

i thought you were meant to do a hard rest after a few minutes anyway

I upgraded to 2.7... I cant believe the eloader doesnt work...

Well, lets look at the good side, I can watch flash cartoons low in memory via the internet...

i downloaded the d-gen and brown ale eloader when my psp was v2.6 and it was working fine but when i upgrated it to v2.7 it said the data was corrupted but i dont want to downgrade to v1.5 i want to downgrade to v2.6. what do i do?

Your out of luck there is NO way to run homebrew and NO way to downgrade on a 2.7. Your just going to have to wait until someone cracks it like they did to 2.6

Whats up everyone.. I currently run the eloader on my 2.5 FW. Anyway yet to downgrade it?
Its not 2.7 = Too early? I am afraid to run the downgrader until i hear some info.

Is it worth it? Does Mame have decent speed? That would be nice to have working on eloader.

Help me Pweeze.

THERE IS NO DOWNGRADER FOR ANY FIRMWARE HIGHER THEN 2.00 HOW MANY TIMES DO WE HAVE TO SAY THAT. (end of rant)

The file linked to in the original post is the only 1.5 firmware available at that site. After downloading it and viewing the readme contained in the archive, I noticed it states the firmware to be the Japanese 1.5 version. Is this correct? I am unclear as to whether or not a USA 1.5 firmware update exists, or whether the Japanese firmware is what we're all using for downgrading. Could someone please clarify this for me before I go ahead and downgrade again? Thanks.

The Japanese firmware is fine there are no differences all you have to do is change the language to english during the setup. As for a 1.5 USA update it dosen't exist except on a couple of UMD's because all of the US ones came preinstalled with 1.5 already.

Yeah the Japanese 1.5 update is fine. It works fine for me anyway.

yes the jap 1.5 is fine
but it is slightly interesting that both a EURO and USA 1.5 update exist
quite strange
me being paranoid used the 1.5 off my EURO Metal Gear Ac!d
success

My psp version is 2.7

is it ok to downgrade it to 1.00 to play homebrew games like neogeo games

PLEASE READ THE LAST TWO PAGES i ALREADY STATED THERE IS NO WAY TO DOWNGRADE ANY VERSION HIGHER THAN 2.00 PLEASE LOOK BEFORE YOU POST.

Quote:

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Originally Posted by wraggster

THIS WORKS FOR ALL PSP'S :D Downgrader download at bottom of post.

EDIT: It seems some anti-virus programs pick up the "downgrader" as a virus. While some hacked versions do indeed contain a virus the real version is still picked up as a virus. Make sure you download the program from here. I assure you this is the official version and contains no real virus. I have tested it my self.~Kaiser

This guide is part of the Emulation/Homebrew Guide Library But is Kept stickied for easy access

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- A Homebrew Downgrade guide by Kaiser -
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REMEMBER THE DOWNGRADING PROCEDURE IS DANGEROUS. EVEN THOUGH IT HAS BEEN TESTED COUNTLESS TIMES I AM STILL IN NO WAY RESPONSIBLE FOR BRICKED PSP'S DUE TO WRONG PROCEDURE.
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The new 2.0 Downgrader for the PSP Is out, Please note that this takes
the current 2.0 Firmware and downgrades it to 1.5 Then you can load
homebrew on your PSP

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/!\ I recommend having the PSP Charged at 100% before attempting this. /!\
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If you have a 1.51 or a 1.52 you now need to upgrade your psp to a 2.0 in
order for the downgrader to work. This can either be done via the Demo
disc or if you are lucky enough to have WIFI use the update icon on the
psp. Or lastly Download the update and simply use a USB cable to transfer
it onto the psp. Below are the official Links for the Sony Updates Ive
included both JPN/US Update versions.

JPN 2.0 FIRMWARE - here
USA 2.0 FIRMWARE - here

Ok now assuming that all went well you now have yourself a PSP 2.0 Firmware
What you now need is the MPH Release Downgrader which can be obtained from the bottom of this post. Once you have downloaded this, plug the PSP into the USB cable
and it wouldnt be a bad idea to plug it into the Power point.

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/!\ I recommend having the PSP Charged at 100% before attempting this. /!\
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Now once you have downloaded the Zip Package and unzipped it with either
windows zip or winrar, winzip etc. the file layout is as follows.


x:/h.bin
x:/index.dat
x:/PSP/GAME/UPDATE/eboot.pbp (this is the 1.50 pbp eboot file)
x:/PSP/PHOTO/overflow.tif

(Where "x" is the drive your computer has given the Memory Stick)

Firmware V1.5 update eboot

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/!\ MAKE SURE THE PSP IS PLUGGED INTO THE AC ADAPTOR AND 100% CHARGED /!\
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Now Exit the USB Mode of the PSP, and goto the PHOTO MENU, this will now
launch the version changer. The PSP Light will go off after the version
changer has done it stuff.
If the PSP does not turn off automatically you can do a hard reset yourself after the required amount of time passes. Wait approx 10-15 seconds and power the PSP back on. Once it is on Enable USB Mode and check to see if the following
file exists.

MEMORYSTICK:/index.dat.bak

IMPORTANT: Please remember that your PSP is still 2.0 but it has been tricked into thinking its actually version 1.0 so you can "upgrade to 1.5"

If so all is well, goto the game menu and Launch the PSP Update and simply
follow the onscreen instructions to update your psp. The update will get to
99% and Fail, No cause for concern this is still correct. The psp will now
do a faily length restart just let it play out. Now one of two things will
happen either the PSP will restart or it will turn off. If the PSP does not turn off automatically you can perform a hard reste to turn it off. After the LED goes off and the psp has turned off.. Wait 10-15 Seconds and power the PSP back on. You now have a 1.50 PSP, Congratulations.


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- A Homebrew Downgrade guide by Kaiser -
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Idon`t if i`m doing something wrong here but when do this and go to the photo menu the overflow.tiff is seen as dmg data. can u tell how and y that is possible i d-loaded it many times now and every time it shows the same.

Hey guys, I'm going through downgrading my psp it was a 1.52 updated it to a 2.0 w/o problems. I downloaded the zip file MPHDowngrader and of course my norton detects it as a virus. but its getting a file called pspbricker and removes it? Why is that file in there? the read me in the zip says nothing about a file with that name. Also it says to move the overflow.tif file into photo directory. There is NO overflow.tif in the zip file?
I'm worried that this zip file has been corrupted recently?

As long as you download it from the link in the guide your fine the overflow.tiff does not have a virus just disable norton when download it or it will delete the overflow.tiff because it thinks it has a virus in it.

ahhhhhhhhhhhhhhh

Wragg needs to make a machine that eats noobs who can't read.

Thanx!!!!

I now have v 2.7 on U.S. PSP and everytime I try this proccess it says the data is corrupted.....

Quote:

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Originally Posted by naldar

I now have v 2.7 on U.S. PSP and everytime I try this proccess it says the data is corrupted.....

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AHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHH HHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHH HHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHH HHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHH HHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHH HHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHH HHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHH HHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHH MAKE IT SToP PLEASE!

what is the title of this thread???
get it

I think wrag needs to change his original post and say it will work only with 2.00..

no the thread is called
2.0 to 1.5 downgrader.
it is pretty obvious what the thread is about
some silly people seem to think that a downgrader whould be kept secret

hi guys,
This is my first post so be gentle. Just bought my 1.5 om ebay and upgraded it to 2.0 firmware (cos there was a thing that said click here to run update so I did. Now I've read a bit more and decided to go back to a 1.5 but it did not work out quite right so I thought I'd start again by going back up to 2.0. However, it got to 97% complete and froze, so I switched it off after a wee while. Now, when i start it up (with no demo disk in it) it makes a little noise, says the date is 1/6 0:12 and then powers down. Is this dead or can it be fixed? If i start it up with the demo disc in, it seems to launch insofar as it will buzz occasionaly, and will also sometimes actually play the demo disc fine. So whats the story, have i killed it or is their a fix.

Have you tried using the power lead when you turn it on? And where did you download the downgrader from?

Yes, tried just now with the power lead and no different. When I did the second upgared to 2.0 it was powered up via the usb cable, is that significant? the downloader came from a link off psphacks, the file was called EBOOT_Loader_v_09.zip and i pretty much unzipped it and followed the instrauctions. One other think, every time i booted it up, until I changed the file in the Photo directory, every time i went into the photo directory from the psp, some gameof pong would automatically launch, is this significant as well?

Very significant. that sounds like a dodgy downgrader! Download the downgrader from this website. And the 2.0 and 1.5 update files from the official psp website. And have the power cord in while your doing it. not the usb way! :p

I'd love to have another go the power chord way- just how do i get the psp started , I have no menu, nothing to choose, it just powers down after 30 seconds?

Try starting the psp without the memory stick in.

Nope, still no good without the memory stick. It starts, shows the the sony splash screen, then a standard background with the date (1/6) and time. The time is actually corrent, 1:11. Then it goes off a few seconds later.

try taking out the battery and just connect the power lead with the battery out. then turn it on

Same thing without battery. Powers up, shows date and time, powers down.

it doesnt sound good.

One last idea.. Try starting it with the umd in. let it load for a few seconds and take it out just before it loads. It's a long shot but might work.

One last idea- does this mean I owe my wee boy a new one?

No! :p

Im just knackered! :p

il have some more idea's for you tomorrow lunchtime!

Or

If your psp's under warranty sony will repair it for you free of charge.

If not sony charge £40-50 to repair it.

Or you can buy a new motherboard.

£50-70

Dont do anything hasty though. I more or less guarantee we will find a solution to your problem, without it involving you dipping into your pocket! :p

When i say we, i mean me and everyone else on dcemu! :p

Hi, I'm back after a sleepless night. Still no change to the PSP. Plays the demo disk quite happily, but when you home and exit, it just goes black and then powers down. The demo disc is actually the only one that starts poor aol Spiderman just fails to get off the ground at all as does any non-disc start-up.so I am in your hands. As a final fling, if I send it to Sony, what ver will I get back?

sorry i didnt get back to you yesterday.
my isp's server was down and i was barley able to access the internet.

So if you send it back to sony it's a mystery what firmware you get back.

I have a spare 2.6 motherboard i will sell to you on ebay if you want. it sounds like that downgrader you used has corrupted your flash.

so will it work for v2.6 or not

Quote:

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Originally Posted by rdoggpmasta

so will it work for v2.6 or not

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NO! Please learn to read before you post!