Dell Inspiron 14z (N411z, Late 2011) - Manual (Page 75)

System Board 75
17 Turn the system-board assembly over.
18 Remove the heat-sink assembly. See "Removing the Heat-Sink Assembly"
on page 79.
Replacing the System Board
1 Follow the instructions in "Before You Begin" on page 9.
2 Replace the heat-sink assembly. See "Replacing the Heat-Sink Assembly"
on page 80.
3 Turn the system-board assembly over.
1 ports 2 system board
3 screws (4)
2
3
1