Lenovo ThinkPad T540p User Manual page 108

Attention: Before you start installing a 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.
Your computer might be equipped with a wireless WAN card. To replace the wireless WAN card, doing
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 lid and turn the computer over.
3. Remove the battery pack. See "Replacing the battery pack" on page 77.
4. Loosen the screw
5. If a tool is provided with the new wireless WAN card to help you disconnect cables, use the tool to
disconnect the cables from the wireless WAN card. If no such a tool is provided, hold the cable
connector with your fingers and gently disconnect each cable from the wireless WAN card.
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User Guide
1 , and then remove the small bottom cover 2 .