Dell Precision 5530 Service Manual page 26

d In reverse sequential order (as indicated on the heat sink), remove the four screws (M2x3) that secure the heat sink to the
system board [4].
e Remove the screw (M2x3) that secures the heat sink to the palm-rest and keyboard assembly [5].
f Lift the heat sink off the system board [6].
26 Removing and installing components