Newly installed, Seagate drive suddenly unrecognizable
Hi, On June 24th I purchased a 750 GB 7200 RPM Seagate SATA Hard Drive (kit) for my 2007 Macbook. I backed up my entire old drive (160 GB) onto my Time Machine, formatted the new drive, and installed it into my Macbook. Up until July 3rd things were running smoothly. I powered on my Macbook only to get a dark gray folder icon with a question mark inside of it. After much frustration I took my computer to the Apple Store to see what was going on and they said that my computer is not able to recognize my new drive. What can I do, need to do, or should I do?
I've also removed the new drive place it inside of an enclosure, plugged it into my iMac and it's still not showing up on my desktop.
Is this a good question?