Dell Inspiron 1420 (Mid 2007) - Manual (Page 151)

Adding and Replacing Parts
151
Replacing a WWAN Card
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 WWAN card, never place cables under the card.
1 Insert the
WWAN card connector into the system board connector labeled
"WWAN" at a 45-degree angle by aligning the notch on the WWAN card
to the slot on the system board connector.
2 Press down the other end of the WWAN card and tighten the screw
securing the card to the system board.
3 Connect the appropriate antenna cables to the
WWAN card you are
installing.
Connect the white striped cable to the connector on the card marked with
a white triangle. Connect the black striped cable to the connector on the
card marked with a black triangle.
4 Secure unused antenna cables in the protective mylar sleeve.
5 Replace the keyboard (see "Replacing the Keyboard" on page 138).
6 Replace the hinge cover (see "Replacing the Hinge Cover" on page 136).