Hard drive not detected by the BIOS and can not be used again.

For improvement is somewhat difficult because we need a little permutations of electronic devices and components inside.  

To handle the hard drive is not detected by the BIOS are:

1. Check the electrical current flowing to the hard drive.

2. Replacing the hard drive IC on mainboard.

3. Cover open the cover and check the hard disk drive head position.

4. Replace defective components which hard drive to replace the component with the other hard drive keruskan different, namely by replacing maiboardnya or take his IC.