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How to Downgrade a PSP Without Pandora's Battery

The Sony PSP is a portable video game device that is highly modifiable. You can downgrade the firmware to an earlier version in order to play games directly from your memory stick. You can downgrade your PSP one of two ways. You can use a pandora battery in order to place the PSP into service mode or you can use the Lumines game hack. The latter of the two requires that you have a PSP running 3.50 in order to downgrade to 1.50.

Things You'll Need

Lumines PSP game
1.50 Sony update file
USB cable
Downgrade pack

Instructions

- 1
  Download the 1.50.pbp file. Rename the 1.50.pbp file to "UPDATE.PBP." Connect your PSP to your computer with the USB cable and select "USB Connection" to place the PSP into USB mode. A window will appear on your computer and you will be able to see the PSP memory stick files.
- 2
  Download the downgrade pack. Open the "MS_ROOT" folder from the downgrade pack. Right-click the "PSP" folder and click "Copy." Go back to the PSP memory stick and right-click it. Click "Paste" and "Yes" to overwrite the data.
- 3
  Right-click the UPDATE.PBP file that you downloaded in step one and click "Copy." Open the "PSP" folder on the PSP memory stick and you will see the "GAME" folder. Open this folder to reveal the "UPDATE" folder. Right-click the "UPDATE" folder and click "Paste" to transfer the update file to your PSP memory stick. The downgrade pack and 1.50 update file are on the PSP memory stick. Press the "O" button to safely disconnect the PSP from your computer.
- 4
  Insert the Lumines PSP game into the PSP drive. Select the game from the PSP menu to start. Press the "Start" button when you get to the Lumines start screen. Your screen will blink red and will turn completely blue. You will be brought back to the PSP screen. It is important to not press any buttons before you get to the Lumines start screen.
- 5
  Go to the game section of the PSP menu and you will now be able to see the "x.yz update" application. Select it with the "X" button to start it. Press the "X button from the main menu to start the downgrading process. Press "X" again to reboot the PSP when the downgrade has completed. You have now downgraded your PSP to 1.50 firmware.

Sony PSP