I'm still leaning towards the hard drive. Does that DVD work in another computer? Did it try to boot at all? Did it show the bios splash screen? Have you reseated the ram?
Ok so I've gone into the bios and made the USB drive (Which is what I am installing from) have priority over all the other devices and the install seems to be working.
So the install is stuck on "Setup is starting..," with the circle cursor spinning around and it has been like it for the last 10 minutes. Would there be anything in the bios I need to change, I've just redone my USB that I am using to install with..