Procedure
1.Remove the two screws that attach the PC card cage to the rib frame. (The longer screw is next to the battery connector.)
2.To remove the 4 mm hex nut that secures the PC card cage to the heat exchanger, you may want to use a finger to support the 5 mm (magnetic) hex screw underneath the nut to prevent the screw from falling out of the screw hole.
Loosen and remove the hex nut. Remove the PC card cage, being careful where it can catch on the PC card eject button. Then, reattach the hex nut temporarily to the hex screw.
