I doubt it was your fault, seeing as it worked directly afterwards, and that I have accidentaly unplugged it a fair few times. The problem seems to be in the bit that makes the hard drive go. It's now just blinking on and off, and making a burning smell :S. The moving of the hard drive would be good, as I would be fairly pissed if I had to move all my files.
Not sure what connection it has, as I know next to nothing about electronics (my only solution is to check and see if the wires are connected).