PS3 Fat won't accept USB update

Well..

Few days ago. I bought a used ps3 fat.

There were a problem with the HDD connector. I fixed it and turned on the device.

I noticed that it had ferrox CFW. but it seemed like if CFW syscalls were disabled and every "CFW thing" was hidden with "SEN Enabler"

I went to system settings. And I saw that it was on 4.82.

I tried to install RebugCFW from USB.

It did found the firmware and it successfully moved it to HDD. And rebooted to install it.

But the sad thing is .

When it was...

PS3 Fat won't accept USB update