How to repair Lenovo Thinkpad t510 Bluetooth hardware

You'll probably have to replace the bluetooth adapter. It's usually a little tiny card that looks like this. It's a bit difficult to explain how to replace without being able to see it, and there aren't any teardowns of the laptop that I can find, so if you'll take some pictures of your laptop, I'll give you step-by-step instructions on what to do.

EDIT:

I actually ended up finding a picture, so I've marked where the part that you would replace is, and I have a dissasembly guide here.