Now with the laptop separated you should be able to see the CPU fan.

Once located remove the two screwed indicated in the red circles.

Then gently remove the plug attached to the fan. Once again, avoid pulling on the wires and try to pull it apart from white connector.

Next slowly lift up the fan from the back and slide it out. From here you can either clean the fans and heat sink with compressed air or replace the fan completely. Assembly is reverse of removal.