Replaced hard drive, but it isn't recognised
I've replaced the original hard drive with a Seagate - Momentus 7200.4 ST9320423AS - Hard drive - 320 GB - internal - 2.5'' - SATA-300 - 7200 rpm
- but no hard drive is showing on the screen when I try to install Snow Leopard.
Have I made a dreadful mistake and bought an incompatible hard drive? Or am I doing something wrong re. formatting the new hard drive? I've put the original HD back in again to check that the laptop is not irretrievably broken, and that still works OK.