ThinkPad P50 User Manual page 148

Attention: Before you start installing an M.2 wireless-WAN card, touch a metal table or a grounded metal
object. This action reduces any static electricity from your body. Static electricity could damage the card.
Some computers might come with an M.2 wireless-WAN card. To replace the wireless-WAN card, do the
following:
1. Turn off the computer; then disconnect the ac power adapter and all cables from the computer. Wait
three to five minutes to let the computer cool.
2. Close the computer display and turn the computer over. Then remove the removable battery. See
"Replacing the removable battery " on page 113.
3. Remove the bottom cover. See "Replacing the bottom cover" on page 116.
4. Remove the keyboard. See "Replacing the keyboard" on page 126.
5. If a tool is provided with the new card to help you disconnect cables, use the tool to disconnect the
cables from the old card. If no such a tool is provided, hold the cable connector with your fingers and
gently disconnect each cable from the old card.
6. Remove the screw. The card is released from the secured position and pivots upward.
7. Carefully remove the wireless-WAN card out of the slot.
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P50 User Guide