It is possible that the hard drive has failed & it is possible it hasn`t.
Have you tried removing the battery & running the laptop via the ac adapter,
also have you tried removing the ram stick/s to see if that makes a difference.
Some other things to try are remove the battery & ac adapter, press the power
on switch for about 30 seconds then re-insert the battery & power up, do the
same with the battery removed & the ac adapter attached if the battery option
does not work, this is to test the battery & ac adapter.
Try and get into the BIOS to see if the HDD is detected there, you could also
consider restoring the factory settings from here, dont forget to save & exit.
Here is how to clear the BIOS; http://www.ehow.com/...ell-laptop.html
Edited by phillpower2, 31 July 2010 - 05:58 PM.