i have a good idea of what its doing.
the ser wont mater as long as the first number are 7 long and the last is 5.
if its just hanging and not flashing the D1.
here is a list of hat to try.
D1 not flashing (for BenQ) :
What that means is the computer is not seeing the 360 drive.There are many different thing that can be causing this problem.
Chipset will not work.Most sata ports on the mobo will not work.
Try a different port on your sata card.The port closest to the front most of the time is the one to use.
Try a different sata card.This is a card that is known to work
http://tekgems.com/Products/la-pci22-vt6421a.htm" onclick="window.open(this.href);return false;
Try a different sata cable
Put the sata card in a different pci slot
I would try this just for kicks before the next step.Try a floppy maybe that will do it (don't hold your breath)
You may even need to try a different computer.This is rare how ever it will happen some time.