i want to downgrade 2.71seb back to 1.5. is it possible

[uranidiot]

has anyone downgraded back to 1.5. i want to downgrade 2.71seb back to 1.5 because i got another psp thats 2.8 for xmas. so can i use the easy downgrade 2.71.

[andrewgabriel77]

don't use the easy downgrade....just use the recovery mode built into se

[ExcruciationX]

Run a 1.5 update eboot through recovery mode. Put the update in the MS/PSP/GAME/UPDATE/ folder. There is an option to run an update in the recovery mode menu.

[joshisposer]

i'm pretty sure you name the update update.pbp

[ExcruciationX]

i'm pretty sure you name the update update.pbp
Nope, it goes in the update folder. The update is named "Eboot.pbp"

[andrewgabriel77]

Here is a cut and paste from Dark Alex's readme

Run program at /PSP/GAME/RECOVERY/EBOOT.PBP. This is what currently enables to recover a
semi-bricked psp (e.g. the vsh doesn't show, but you can reach the recovery mode).
Despite being in the game folder, that program will be executed in 1.50 kernel, so if even 2.71
kernel is destroyed, that program can be run.

Because official SCE updaters don't work in that 1.50 kernel environment (because they need some vsh files
not available), i've included with this package a flasher that lets to flash any official update from
1.50-2.71 to your psp.
To use it, copy the files inside inside "flasher for recovery/RECOVERY" in /PSP/GAME/RECOVERY/
and the official SCE updater renamed as UPDATE.PBP in the same directory, and run the program
through the recovery option.