Download firmware 4.46 to unbrick your PS3
It's like a doorknob, in that, you can't be certain how many germs are on it -- you don't care. You turn it anyways, yet still your uncertain. That was a crude analogy, but these are becoming crude, periodic updates.
Sony has a toe-to-the-line process that is distilled in three steps. Upon, downloading firmware 4.46 (via USB method,) you'll have enter safe mode on your PS3, then, proceed with the installation.
This is a simple, yet roundabout method to unbricking your PS3.