Lenovo ThinkPadP50, User Manual

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4. Turn the computer over. Reinstall the screws to secure the keyboard in place.
5. Reinstall the bottom cover. See “Replacing the bottom cover” on page 120.
6. Reinstall the removable battery. See “Replacing the removable battery ” on page 117.
7. Turn the computer over again. Connect the ac power adapter and all cables to the computer.
Replacing an M.2 wireless-WAN card
Before you start, print these instructions. Read the important safety information first. See “Important
safety information” on page vi.
Notes:
• The following information is only for user-installable modules.
• Depending on the model, your computer might look differentl from the illustrations in this topic.
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 117.
3. Remove the bottom cover. See “Replacing the bottom cover” on page 120.
4. Remove the keyboard. See “Replacing the keyboard” on page 129.
Chapter 10
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Replacing devices
133