First of all, download this recovery files. You must login or register to view this content.
Unzip the .zip file and it will show up two folders (Lv2Diag File 1 & Lv2Diag File 2)
Put your PS3 on Recovery Mode (it its bricked it will not show you the Recovery Screen, it will just turn off once you click power+eject)
Then format a USB and put the following files on the root: Lv2Diag.self (From the File 1 folder) and PS3UPDAT.PUP (Your current firmware)
Put the USB on the right USB port of the PS3 (The one closer to the Disc Reader) and turn it on
The screen will be black, just wait 10 minutes approximately and the PS3 will turn off it self (If the PS3 doesn't turn off after 10 minutes, turn it off manually)
Turn the PS3 on and you'll see the Recovery Mode screen, after this erase everything from your USB and put the Lv2Diag.self (From the File 2 folder) on the USB root
Turn off the PS3 and put the USB on the right USB port of the PS3 (The one closer to the Disc Reader)
Turn your PS3 on and then it will turn off, turn it on again and your PS3 will be unbricked