Dell Precision M2400 (Mid 2008) - Manual (Page 96)

Replacing the WLAN/WiMax Card
1. Slide the card into the connector labeled WLAN/WiMax.
2. Press the card down and hold it in place.
3. Replace the M2 x 3-mm screw.
4. Connect the appropriate antenna cables to the card you are installing:
If the card has two triangles on the label (white and black), connect the white antenna cable to the connector labeled "main" (white triangle), and
connect the black antenna cable to the connector labeled "aux" (black triangle). Secure the gray antenna cable in the plastic holder next to the card.
If the card has three triangles on the label (white, black, and gray), connect the white antenna cable to the white triangle, connect the black antenna
cable to the black triangle, and connect the gray antenna cable to the gray triangle.
5. Replace the bottom of the base assembly (see Replacing the Bottom of the Base Assembly ).
6. Follow the procedures in After Working on Your Computer .
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NOTICE: The connectors are keyed to ensure correct insertion. If you feel resistance, check the connectors on the card and on the system board,
and realign the card.
NOTICE: To avoid damage to the WLAN or WiMax card, ensure the cables are not under the card when you replace it.
NOTICE: Insert a WLAN or WiMax card only into the slot labeled WLAN/WiMax.
1 WLAN card 2 gray antenna cable
3 holder by card 4 white antenna cable
5 black antenna cable