Other than the generic 2.50 TA-082 Downgrader name, I’m nick naming it the TA-082 “Kick-ass” Downgrader! If you are a TA-082 user with a 2.60 or 2.71 PSP, you can downgrade back to 2.50 using the DAX generic downgrader.

So users of 2.50, 2.60 and 2.71 can all downgrade to 1.50… Or 2.71 SE-C!! You can choose 1.50 or SE-C. dark_thug gives a warning though: SE-C may lock-up while playing some games.
The catch? On 1.50, trying to change settings menu gives a Blue Screen of Death. This means you can simply not change your Video options, System settings, etc.

Homebrew, USB, Music, Videos, Pictures, Games; all remain.

On a brighter note, the BSoD could theoretically be fixed, using an app like X-Flash to flash a new system reg from a 1.50 user! Or, while making the dump, switch the 2.50 reg with the 1.50 reg. This is risky however.
The TA-082 Boards can also be downgraded to 2.71 SE-C! The BSoD will be gone. The catch again, you may not be able to return (to 1.50). If you can, it will most likely use the same update made to downgrade from 2.50. That still has not been tested.

Last thing, 0okm mentioned this before. Doesn’t matter if you choose SE-C or 1.50, you CANNOT upgrade again. It will most likely brick your PSP!

Instructions

1. Use the DAX generic downgrader to change your ver. to 2.50 if it isnt already.
2. Downloaded the 2.50 TA-082 Check & Dump v1.20 to dump your firmware.
3. Enter your settings in the executable.
4. It will generate the downgrader. Copy the folder ‘UPDATE’ (the folder it makes) to x:/PSP/GAME
5. download eLoader and put it on your PSP. Load it from the photo menu.
6. Choose ‘UPDATE’ from the eLoader menu. This wil begin the downgrader. It will patch your bootstrap to make it a 1.5.
7.Reboot your PSP AFTER it has finished COMPLETELY! You should get a blue
screen. Hit O and restore your settings.

I can not stress this enough: If you do not know what you are doing, don’t attempt this! There is a high chance of bricking your PSP! Use at your own risk!


Files you will need:

TA-082 Downgrader

TA-082 Dump & Check v1.20

DAX 2.71 Generic Downgrader

eLoader 0.99 [exe] [zip]

[Source]

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