psp doesnt work properly

[one winged angel]

today i was deleting some manga on my psp in usb mode suddenly my psp froze. i restarted it and my psp was extermely slow so i reinstalled the firmware etc
i was back on 3.40 oe i formatted my mem stick via recovery. i went into the xmb and i started usb mode screen started flickering with random distortions. so i thought my mem stick is broken but that cant be since i can read/write from recovery mode. i restarted and gone into recovery mode wrote a movie on the mem stick doesnt read in XMB and shows random distortions on screen and XMB becomes extremely slow. so i need your help

[pibs]

do you have a pc card reader? if you do try formating your memory card in the pc that way.

[one winged angel]

tried that already oh and in cyase someone wants to know its an sandisk 4GB ultra no fake

[Saracchini]

You tested your PSP with the 32 MB Memory Stick or another one ?

Even a non fake memory stick can become damaged sometimes...

[one winged angel]

You tested your PSP with the 32 MB Memory Stick or another one ?

Even a non fake memory stick can become damaged sometimes...

true but i think it seems like its not the memory stick but the psp since it work perfect on my pc