Hey there guys.
I recently bought a second hand fat psp and I'm attempting to modify it by installing some CFW.
The PSP originally had 3.90 m33-3 on it. However, I searched for the most up to date piece of CFW and I came across version 5.50 GEN-A (Full). I really should have done more research first because I think I'm right in saying that version 3.90 m33-3 was really a much better choice. With this piece of CFW I can't install homebrew or play ISO's, which is what I want to do.
So I google'd around and It looked as if reverting back to 1.5 through recovery mode would be a good start. I downloaded 1.5, chucked it on the PSP and tried to it through recovery. However, the screen just goes black for around 10 seconds and I am then presented with an error saying: "The game could not be started. (800201A8).
Does anyone know i can correctly revert back back to 1.5, or how i can ultimately get the PSP back to running 3.90 m33-3 (or whatever CFW you recommend)?
Edit: I should mention that when i bought the PSP, it would behave erratically (freezing, wouldn't turn on) whenever the mem stick was in. The mem stick had two games on it so I figured they must be damaged ISO's or something. I formatted the mem stick and it resolved the erratic behavior. I am not sure if this could have anything to do with the problems I am having at the moment.
Any help would be greatly appreciated!