I was following this guide http://www.ps3hax.net/showthread.php?t=39766
and when I put the micro SD with the e3_downgrade.bin (including my dump), had been a power failure and the PS3 turned off. I tried to turn it on but after 5 seconds the ps3 turns of by itself... I don't know what to do. I have a validate dump but how can I unbrick my console?