New hard drive-now its really not working.

Ipod classic 6th generation 160gb

I assumed my hard drive died, so I purchased a new hard drive. I followed the guide on here and after putting everything back together, the red X appears.

The ipod will not go into disk mode. When I run a test on the hard drive in diagnostic mode, it says "error diag halt."

The hard drive does not make any sounds when the ipod turns on. I connected the old hard drive and it doesn't make any sounds either.

Is it possible that I damaged the hard drive cable?

Thanks