Dell Latitude 5421 Service Manual page 24

Steps
1. Connect the antenna cables to the wireless card.
The following table provides the antenna-cable color scheme for the wireless card that is supported by your computer.
Table 2. Antenna-cable color scheme
Connectors on the
wireless card
Main
Auxiliary
2. Align the notch on the wireless card with the tab on the wireless-card slot on the system board.
3. Slide and insert the wireless card at an angle into the wireless-card slot on the system board.
4. Adhere the wireless card to the adhesive pad.
5. Align the screw hole on the wireless-card bracket to the screw hole on the wireless card and system board.
6. Tighten the captive screw that secures the wireless-card bracket to the wireless card and the system board.
Next steps
1. Install the microSD card.
2. Install the SIM card.
3. Install the base cover.
4. Exit Service Mode.
24 Removing and installing components
Antenna-cable color
White
Black
Silkscreen marking
MAIN
AUX
△ (white triangle)
▲ (black triangle)