Do you have an IDE CDrom or DVDrom drive?
If you do, use that IDE and power cable and jumper setting.
Take the cdrom drive out.
Look at the back of it, where the ribbon cable and power cable are, there should be a white or black jumper on a couple of pins.
Look at that setting, and set your old hard drive to match it.
Plug your old hard drive into that IDE and power cable, making sure you set the jumper correctly.
Power on and check to see if you can see it now....if not, listen to the drive, is it spinning up, can you hear any odd noises, grinding, ticks...let me know.