Originally Posted by SonOfACockroach
If TSASuper is right and you are talking about a computer, I would suggest pulling the hard drive and carrying that one the plane with you. As far as I know, hard drives especially do not react well to being knocked around. I'm not sure if that only applies when it is on. Maybe one of the technophiles on this board could clarify.
Depending on the age of the computer the hard drives usually go into a park mode when shut down properly so the probability of platter crash is slight. When you get to the destination I would suggest you open the PC and check all card placement and connectors before powering up. They can dislodge and cause problems if not checked.