Then I can't help you...
I would try formating the hdd from the PC and installing the current OFW from recovery
Let's see is someone else check your post
Your nickname fit you perfectly :biggrin2:
Psx-place consider posting psx-place links as spam, so I can't written the link.
Look for it in Google:
CFW 4.90 Evilnat Cobra (8.4) (CEX/DEX/PEX/D-PEX)
4.90 CFW CEX NoBD is your desired CFW
Follow this. You don't need rebut toolbox, everything is...
It is not enough plugging the new BD and turning it on.
You need to pair/marry the new BD with the motherboard and you can do it from a CFW.
Evilnat CFW offers the marry BD option, but I never used it before, I just showed it.
This shows up from a fast search...