[ottoman]

I had this prob before on a version 4. When u falshed the PS2 up the drive would twitch twice but not spin up. It turned out that I did not have the ribbon cable coming off the dvd drive to the motherboard in far enough. If its one of those connectiors where u hinge a clamp up then push the ribbon in then u have to hing it right up as far as it goes and then push the ribbon right back in. If u dont lift the clamp up far enough the ribbon only goes half way in and it won't work, check other end of ribbon on dvd drive as well in case this has come loose while disassembling.