Lenovo ThinkPad T431s User Manual page 82

DANGER
Electric current from power, telephone, and communication cables is hazardous. To avoid shock
hazard, disconnect the cables before opening the cover of this slot.
Attention: Before you start installing an M.2 wireless LAN 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.
To replace the M.2 wireless LAN card, do the following:
1. Disable the built-in battery. See "Disabling the built-in battery" on page 59.
2. Close the computer display, and turn the computer over.
3. Remove the base cover assembly. See "Replacing the base cover assembly" on page 61.
4. 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.
5. Remove the screw
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User Guide
1 . The card is released from the secured position and pivots upward 2 .