I'm doing all the recomended procedures but with no success... I already tried to upgrade my JB2 files but after i download it and plug the JB2 in my PS3, the green light blinks and then it turns off.
I dont know if this helps to solve the problem, but a couple days ago i bought another JB2 but i sold that one. So, the JB2 that i own is the second one that im plugging into my PS3.
And before i forget, here is the configuration of my console: PS3 Fat, 20GB, 2USB's, upgraded to V3.41, disconnected from the internet.