Dell Inspiron DCMA Owner's Manual page 158

3 Align and press the heat sink and fan assembly till both snap in place.
1
2
3
4 Replace the heat sink assembly (see step 9 of "Installing the Processor" on
page 148).
5 Replace the cables that were removed from the routing clips on top of the
processor fan assembly.
158
Removing and Installing Parts
1 fan 2 fan cover 3 heat sink