Installing The Heat Sink Assembly - Dell Vostro 15-7570 Owner's Manual

4 To remove the heat sink assembly:
a Turn over the system board and remove the M2x3L(6) screws that secure the heat sink assembly to the system board [1].
NOTE:
b Lift the heat sink assembly from the system board [2].
5 The component you are left with is the heat sink assembly.

Installing the heat sink assembly

1 Replace the heat sink assembly on the system board.
2 Replace the M2x3L(6) screws to secure the heat-sink assembly to the system board.
34 Removing and installing components
Loosen the screws based on the numbering on the heat sink.