Replacing The Wireless Wan Card - Lenovo ThinkPad T550 User Manual

8. Reinstall the bracket and install the screws.
9. Reinstall the base cover assembly and the removable battery.
10. Turn the computer over again. Connect the ac power adapter and all cables to the computer.

Replacing the wireless WAN card

Note: The following information is only for user-installable modules.
Before you start, print these instructions. Read the important safety information first. See "Important
safety information" on page vi.
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. Disable the built-in battery. See "Disabling the built-in battery" on page 121.
2. Close the computer display, and turn the computer over.
3. Remove the battery pack. See "Replacing the removable battery" on page 122.
4. Remove the base cover assembly. See "Replacing the base cover assembly" on page 130.
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.
.
Chapter 10 Replacing devices
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