WD 500GB detected under device manager but drive not showing up

Hello,
I have WD500Gb HDD, recently it stopped showing up in my drives where as it lists under device mangaer.

i ran the disk management and it shows as Disk 1 Unknown uninitialized.
when i try to initialize it is throwing unable to initialize Fatal hardware error.

i understodd that the hardware has gone faulty.
how can i figure out which part of the hardware is fault .BIOS or Memory or Processor.
how to retreive the data