Dell Inspiron 1526 (Late 2007) - Manual (Page 152)

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Adding and Replacing Parts
4 Remove the M2 x 3-mm securing screw.
5 Remove the FCM.
Replacing the FCM
NOTICE:
Install the FCM in the WWAN slot. Do not install an FCM in the WLAN
card slot. Doing so may cause damage to your computer.
1 Insert the
FCM connector at a 45-degree angle into the system board
connector labeled "FCM".
2 Press the other end of the
FCM down into the slot on the system board
until the card clicks into place.
3 Replace the M2 x 3-mm securing screw.
1 FCM Card 2 M2 x 3-mm securing screw
2
1