What models these are. Why I wonder is some folk bump up the drive size or speed and this happens.
My Dell Inspiron 1520 is 2 years old, with 320 GB hard drive, 3 GB RAM, Windows XP Pro, and some other things. It's on it's 4th hard drive. I'm nervous using it, and back it up daily to my external drive. Me and my technician suspect it's the motherboard controller. What do you thing it is, and how much it will cost to repair? If it's over $100, and my technician confirms it (he has a diagnostics CD, but it only works if the hard drive is crashed), I will buy a new one.
Also, the 2nd and 3rd hard drives wouldn't even spin. The 1st one I got some data off of, but none of the others.