i had the same problem.... mine would turn on, do a series of beeps, that i know is a code, and turn off.... since i could not find a guide for the codes (mine beeped once when first turned on then twice really fast right beofre turning off).. so by process of elimination i figured out it was the HDD.. so i plugged it into an external enclosure, formatted it to raw and put it back into the ps3 and its worked fine since... i bleive mine was corrupt but then i honestly can't tell for sure