Lenovo 21C3S0RL00 User Manual page 53

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 43.
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 44.
Removal procedure
Note: A Mylar film might cover the wireless WAN card. To access the wireless WAN card, peel off the film
first. Do not damage the mylar film and attach it in place after installation.
Type 1
.
Chapter 6 CRU replacement
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