Dell P74F Service Manual page 65

c. Disconnect the eDP cable from the connector on the system board [3].
d. Pry the adhesive tape that secures the eDP cable in place.
e. Disconnect the two fan cables from the connector on the system board [4,5].
f. Loosen the 4 captive screws that secure the heat sink assembly to the system board [1].
NOTE: Remove the captive screws in the order stamped onto the heat sink next to the screws [1 > 2 > 3 > 4].
g. Lift the heat sink assembly [2].
Removing and installing components 65