Hello there, I have currently hacked 2 PSP Slims last night, a white one and a black one. I used the Pandora's Battery hack to do so. They both have the 3.71 M33 custom firmware but while the white one works perfectly fine and plays both homebrews and ISO, the black one only plays Homebrews and give an error when you try to launch the ISO. It reads the ISO but it's unplayable. I did them both exactly the same way a the same time. I even tries redoing it about a billion times and it still doesn't play ISO games. I even updated it to the 3.90 M33 firmware and still nothing. Can anyone help me on this one? the PSP model is a PSP 2001. thank you for your time.

I have a UMD in mine at all times try putting one in. Did you make sure all your settings are correct in RECOVERY mode? Such as running an iso without UMD or with one? And its not "hacked" its downgrade....lol

try using it to downgrade it back to 1.50 and make it custom again and see if that makes it work

LMAO you cant downgrade a psp slim to 1.5 snoop... slims dont support anything lower than 3.60. make sure you have the same UMD/ISO settings in recovery menu for both of the psps tapion817

Ohh I figured it out a few minutes after I asked, my bad. I jstu had to put the M33 driver on and it works perfectly. thanks aanyways.

ya