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Communication daughter card removal and installation - ThinkPad T40/p, T41/p, T42/p, T43/p

Click here to view the Communication Daughter Card (CDC) modem removal movie.
Click here to view the Communication Daughter Card (CDC) modem installation movie.

Your computer has a Communication Daughter Card (CDC) slot, in which you can install a Modem Daughter Card (MDC) or a Bluetooth Modem Daughter Card (BMDC).

Replacing the MDC
  1. Turn off the computer; then disconnect the ac adapter and all cables from the computer.
  2. Close the computer display, and turn the computer over.
  3. Remove the battery.
  4. Remove the keyboard.
  5. Remove two screws securing the card
    Remove two screws
  6. Remove the card by pulling the tab with your fingers.
    Remove the card
  7. Turn the card over (1), and then disconnect the modem cable (2) from the card.
    Disconnect modem cable
  8. Connect the modem cable to the new card (3), and then turn the card over (4).
    Connect modem cable
  9. Attach the new card to the slot so that it is seated firmly.
    Attach the new card to the slot
  10. Secure the card with two screws which you have removed in step 1.
    Secure card with two screws
    Note: Do not use the keyboard screws to secure the card. The two screws for the MDC are shorter than the keyboard screws.
  11. Reinstall the keyboard.
  12. Put the battery in place.
  13. Turn the computer over again. Connect the ac adapter and cables to the computer; then turn it on.
Replacing the BMDC
  1. Turn off the computer; then disconnect the ac adapter and all cables from the computer.
  2. Close the computer display, and turn the computer over.
  3. Remove the battery.
  4. Remove the keyboard.
  5. Remove two screws securing the card.
    Remove two screws
  6. Remove the card by pulling the tab with your fingers.
    Remove the card
  7. Turn the card over (1), and then disconnect the modem cable (2) from the card. Disconnect the Bluetooth antenna cable from the card (3) by pulling the tab marked BT with your fingers.
    Remove the cables
  8. Connect the modem cable to the new card (4) and the Bluetooth antenna cable (5), and then turn the card over (6).
    Reconnect the cables
  9. Attach the new card to the slot so that it is seated firmly.
    Attach the card to the slot
  10. Secure the card with two screws which you have removed in step 1.
    Secure card with two screws
    Note: Do not use the keyboard screws to secure the card. The two screws for the BMDC are shorter than the keyboard screws.
  11. Reinstall the keyboard.
  12. Put the battery in place.
  13. Turn the computer over again. Connect the ac adapter and cables to the computer; then turn it on.
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Document ID : PD014245
Legacy Document ID : MIGR-52643
Last Updated :
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