Home >> Internet Games >> Sony PSP

How to Downgrade Regular Firmware

Downgrading regular firmware on an electronic device will revert the product back to an older software state. In the case of the Sony PSP, downgrading the firmware brings back features that Sony went on to remove in later software updates. The only way to downgrade any regular PSP firmware is to use a service tool. This tool places the PSP into a read/write state where any firmware can be installed onto it.

Things You'll Need

Service tool
MMS -- which comes with service tool

Instructions

- 1
  Turn the Sony PSP on its screen and push in the button on the battery release cover. Pull the battery cover off and remove the battery.
- 2
  Remove any memory cards from the PSP's card reader and insert the MMS into the PSP card reader.
- 3
  Insert the downgrade battery, often referred to as a PSP service tool, and the PSP will turn on automatically. The PSP's service menu will be displayed.
- 4
  Press the button on the PSP gamepad that coincides with the "Downgrade" option that is displayed on the service menu. This is usually the "X" or "O" button, but it depends on where you purchased the PSP service tool.
- 5
  Press the "X" button to reboot the PSP when the downgrading program asks you to reboot the PSP. When the PSP turns back on it will be running the downgraded firmware.
- 6
  Remove the service tool battery and MMS and insert the battery that came with the PSP.

Sony PSP