Seagate 500GB doesn't detect in BIOS

[toknwmore]

Hello Friends,

I got my 500 GB hard drive not detected in BIOS now. Previously it was detected and this was my boot disk. Before few days I got error by AVG and I had take my date and format the hard drive then after I had put it as my secondary storage drive on my PC but after few days it crash and now I have my date on this secondary storage drive. The hard drive is not detected in BIOS too. I have tried Seagate utility but it didn't work. I have put it on terminal but I didn't get terminal prompt at all.

Seagate ST500DM002
S/N: Z2AT6SY9
P/N: 1BC142-JC4B

I am hopping guidelien in this. I got my date on hard drive.

[drHDD]

Did you checked drives on other computer? If you lost 2 drive in same time, so probably you have problem with power supply.