Dell INSPIRON 531S Owner's Manual page 156

3 Carefully disconnect and move any cables that are routed over the heat
sink assembly.
CAUTION:
hot during normal operation. Be sure that it has had sufficient time to cool before
you touch it.
4 Remove heat sink (see step 6 of "Removing the Processor" on page 148).
5 Disconnect the processor fan cable from the system board (see "System
Board Components" on page 107).
6 Ensure that all cables have been removed from the routing clips on the top
of the processor fan assembly.
7 Clean the grease from the heat sink surface previously in contact with
the processor.
1
2
3
156
Removing and Installing Parts
Despite having a plastic shield, the heat sink assembly may be very
1 fan 2 fan cover 3 heat sink