@ alex_e - you forgot to ask if he has the ta-88v3
and if it was ta-88v3, I'm sorry to say but you can't unbricked it, send it to sony to repair the psp. but it will come with 6.00 OFW. Maybe you use the hellcats recovery flasher to ta-88v3 or if not then maybe you use the Hellcats recovery 1.5 that has a bug