Guide for How to Downgrade a Slim PSP to 1.50

Downgrading certain electronic devices to prior software versions is a legal action, but companies tend to make it difficult to perform. The PSP is included in this category of devices. Sony has made it hard to downgrade any PSP model, including the Slim, to any past software release. However, software developers finally found an easy way to access the PSP service menu. A service battery is the tool needed to downgrade a PSP Slim. The battery places the PSP Slim into service mode where past releases, like 1.50, can be installed.

Things You'll Need

  • Service battery
  • Memory card with 1.50 installed
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Instructions

    • 1

      Turn off the PSP. Remove the battery cover from the back of the PSP. Release the cover by pushing the small button on the back. Pull out the battery.

    • 2

      Insert the memory card that has the pre-installed 1.50 PSP software on it.

    • 3

      Insert your service battery of choice. The PSP will turn on automatically. If it does not, turn on the PSP manually. The service menu will show on the PSP screen.

    • 4

      Select the "Install 1.50" option on the service menu. Press the "X" button to start the downgrading process. Put the PSP on a table and wait for it to complete. This will take no more than five minutes.

    • 5

      Press the "X" button again to turn off the PSP. You can now remove the service battery and memory card and insert a normal PSP battery. The PSP has now been downgraded to 1.50.