So my little bro has this old Lenovo Thinkpad...something or other. It had an old 80GB HDD in it, but about a month or so ago it seemed to have ruined the HDD. How, I have no clue, but it wouldn't spin up at all. So we put a brand new WD 320GB HDD in it and the same thing is happening now, however at times it does seem to be able to spin up and work for a few hours. Is the laptop itself causing harm to the HDDs? If so, what could be causing it?