Please you guys have to help me out here in a very big problem and needs help.
I was using a costume firmware of 3.03 and one of my friends upgraded it to 3.90 and since then the psp cant recognise a saved picture, mp3 musics and videos and when i downoad CSO or ISO games and put in it yet the psps cant play it and am confused.
I have formated the psp more than 4 times yet its still doing thesame thing.
Please if anyone who can help me out here, i will be very greatful.
please i need you guys.
thanks.

, Have you checked whether your memory card is corrupt? Try someone elses.
if all these dont work, then you have bricked your psp. But dont be scared, just download this software (U can get it at psp-hacks.com or dark-alex.org) :

Despertar del Cementerio.(Version 5)

just follow the instructions and you'll reflash the software on the rom

thanks man, i have already done it before i read this feedback ok.
hope to hear from yaa soon.

Henry talk to me I know some1 that can help but distance barrier you can trust me, can't you?