I have a 2.5 gig hard disk.

It was working ok, then I connected it to a different pc and it was not recognised by the BIOS. Only the green LED on the Disk circuitry would flash, wouldn't even spin up at all.
Now not even the LED works! No ther machine now sees it either.
What do you think is wrong, and why do the data recovery agencies charge way too much for the recovery of them?

Anything I can do myself...I am quite tecnical on everything else to do with PCs!

Rudders