Disk Utility doesn't recognize HD. Installed new one, same problem.

Hello,
I have a MBP. It suddenly wouldn't boot up, and had the flashing question mark folder upon starting up, so I figured that the HD needed to be replaced. I ordered a brand new drive, and when I try to install Leopard, it doesn't see the new hard drive. I open Disk Utility to partition the drive to GUID, but Disk Utility doesn't even see the new drive. Just my optical drive is listed.
I hooked up the old hard drive externally to another mac, and it appears to be working just fine. So it isn't a bad drive as I had originally thought.
What else could be wrong? The laptop fails to see any internal hard drives. Is there anything else that I can do to fix this problem? Thanks.

Purely conjecture, your serial ATA controller may be bad (or the cable). I assume nothing shows in System Profiler/Hardware/Serial-ATA either. Maybe try the SMC reset?
-If the computer is on, turn it off.
-Disconnect the AC Adapter and remove the computer's battery.
-Press and hold down the power button for 5 seconds and then release the button.
-Reconnect the battery and AC Adapter.
-Press the Power button to restart the computer.

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Author: Troubleshooting Mac® OS X
Note: The information provided in the link(s) above is freely available. However, because I own The X Lab™, a commercial Web site to which some of these links point, the Apple Discussions Terms of Use require I include the following disclosure statement with this post:
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