I think you're being a little paranoid there. I've got a feeling that if the laptop problem is going to screw up his data, it's already happened.
If the laptops completely dead, check the battery/power supply to see if that's the problem. If not, you'll have to pull out the HD as described above.
If you're getting power lights and humming noises and stuff, you could have a bad screen or a loose connection. Try connecting an external monitor and see if anything shows up on it.
I try not to let my ignorance prevent me from offering a strong opinion.