Dell XPS 14 9440 Owner's Manual page 57

Prerequisites
If you are replacing a component, remove the existing component before performing the installation process.
About this task
NOTE: If either the system board or the heat-sink assembly is replaced, use the thermal grease that is provided in the kit to
ensure that the thermal conductivity is achieved.
The following images indicate the location of the heat-sink assembly and provide a visual representation of the installation
procedure.
Figure 25. Installing the heat-sink assembly
Steps
1. Align and place the heat-sink assembly on the palm-rest assembly.
2. In sequential order (1>2>3>4>5) as indicated on the heat-sink assembly, tighten the five captive screws that secure the
heat-sink assembly to the system board.
3. Align the screw holes of the heat-sink assembly with the screw holes of the system board.
Removing and installing Field Replaceable Units (FRUs) 57