[JenB]

I had this problem with an HP laptop a few years back. The power jack had come detatched from the motherboard. I ended up getting a docking station for the laptop, it connected differently and avoided the broken power jack. It worked, anyway.

[Robert A Cook PE]

Try the same cord on an identical laptop (which might not be easy to find, granted). Wiggle the laptop - as if you were using it the way you do now.

Then try THAT person's power supply cord in your laptop. See where the failure. Could be both ends.

[mom4kittys]

I've been trying to do some internet research but I'm not sure what keywords to use. I read something about a port replicator--do you know what that is? Would that help?