This guide recovers semi-bricked PSP SLIM's (this will work on FAT systems that have been semi-bricked with 3.71 M33 and above firmware).

Things you need...

A semi-bricked FAT/SLIM PSP with 50% or higher battery life (you can press R & L at the firmware selection to override the battery check if you need to).

Hellcat's Recovery Flasher v1.32

Sony OFW 3.71 & 4.01 which you can get HERE.

Once you have downloaded all above files then we are ready to start the process.

1) Extract the Recovery folder from the 23692_rflash132 RAR archive (no other files/folders are needed).

2) Extract the 3.71 OFW Eboot and rename the EBOOT.PBP to 371.PBP

3) Extract the 4.01 OFW Eboot and rename the EBOOT.PBP to 401.PBP

4) Drag both 371.PBP and 401.PBP to the recovery folder.

5) Drag the Recovery folder to the /PSP/GAME folder directory. So you would have a directory of ms0://PSP/GAME/RECOVERY.

Inside the Recovery folder should be EBOOT.PBP 371.PBP and 401.PBP

6) Turn off the PSP (hold power button in the up position till it turns off). Now hold the R shoulder button down while turning the PSP on.

This will bring up the recovery menu.
When the recovery menu comes up go to RUN PROGRAM AT /PSP/GAME/RECOVERY/EBOOT.PBP

This will launch Hellcat's Recovery Flasher.

7) You will first get a warning screen with a few options. (You can quiet/Accept/Accept and not show warning screen again).

Choose the option you want.

8) You now have the choice to flash the semi-brick PSP to 3.71 M33-4 or 4.01 M33-2. Choose the firmware you want to flash.

9) You now have a choice to reset settings or keep previous settings.
After you have select whether you want to reset or keep settings it will then begin to flash the firmware. When it is done it will tell you to shut down.

After you shut down you can now turn on the PSP and use as normal (you might have to enter your settings again or you could get the BSOD if so just press O and it will restart and you will then need to re-enter settings).