Installing The Heat Sink; System Fan; Removing The System Fan - Dell Vostro 14–3478 Owner's Manual

b Optical drive
c Keyboard
d Base cover
3 To remove the heat sink:
a Loosen the captive screws that secure the heat sink to the system board [1].
b Remove the heat sink from the system board [2].

Installing the heat sink

1 Align the screws on the heat sink with the screw holders on the system board.
2 Tighten the captive screws to secure it to the system board.
NOTE: Secure the screws in the order of the callout numbers [1, 2, 3, 4].
3 Install the:
a Base cover
b Keyboard
c Optical drive
d Battery
4 Follow the procedures in

System fan

Removing the system fan

1 Follow the procedure in
2 Remove the:
After working inside your computer.
Before working inside your computer.
Removing and installing components 29