hello every body , i am sorry for my bad english .
i try to downgadre my ps3 CECH 2501A, i use khaledoon tuto , all ok , e3 flasher not error , but after restore step (all switch down) , turn on it make black screen ,can't turn off.
i take 3 nor files all same no errors , when use flow rebuilder he say: operation completed with errors .
any help please ?
this my nor file :