(adsbygoogle = window.adsbygoogle || []).push({}); Hi There NGU Members

I have downgrading my PS3 and did everything and when i turn up my ps3 a black screen saying "The System Software cannot be run correctly.

I have tried updating it but it just stays on saying "Checking... Please Wait..."

i just need to install rogero downgrade rogero downgrader 3.55 ofw

plz help

Q/can i flash back my original bios to the nor to start the whole progress Again