so the original bluray drive wont work in your system but will in other systems.
you need a multimeter to check the power connector on the motherboard when the system is turned on.
"the bluray drive is dead" makes me assume the drive wont take in or spit out discs. if it takes in and spits out discs, then its getting power and could have other issues.
let me know a few more details and i can explain further.
Offering cheap and reliable PS3 downgrade and debricking services in the United States
just contact me through PM