Is your trackpoint broken? Let's replace its inner assembly!
First up, remove the red trackpoint cap. Just pull it with your hand, and it should easily come off:
Unscrew the two large screws at the bottom of the module:
Separate the top and bottom module parts. You don't actually need any tools, and they should come apart easily when pulling them with your hands in opposite directions:
With the top and bottom parts apart, you should see the following:
Lift the assembly with a prying tool. Don't try to separate the blue circuit board from the black spacer beneath because they're glued together:
Disconnect the assembly from the FFC connector by pulling the cable in the opposite direction:
Now the assembly should be separated from the module:
Take the new assembly, and reverse the above steps to assemble your module with it.