Ok.Here's what happened.
I downgraded my bros psp from 2.71 to1.5
installed some homebrew
got rachet and clank:size matters(got 2 one for me ond one for bro)
bro tried to update psp from 2.82 to 3.11
but I had taken the battery pack out in hopes of
killing the update.
Now his psp will turn on but thenn after about 10 seconds it turns off.
Is his psp dead or can it still be revived?