Lenovo 21F60099CA User Manual page 55

Prerequisite
Before you start, read
Generic Safety and Compliance Notices
Attention: Do not touch the contact edge of the wireless WAN card. Otherwise, the wireless WAN card
might get damaged.
For access, do the following:
1. Disable the built-in battery. See "Disable Fast Startup and the built-in battery" on page 45.
2. Turn off the computer and disconnect the computer from ac power and all connected cables.
3. Close the computer display and turn the computer over.
4. Remove the base cover assembly. See "Base cover assembly" on page 46.
Removal procedure
Note: A Mylar film might cover the wireless WAN card. To access the wireless WAN card, peel off the film
first.
Depending on your computer model, do one of the following to remove the wireless WAN card:
• Type 1
and print the following instructions.
Chapter 6
. 49
CRU replacement