Lenovo ThinkPad L540 User Manual page 91

DANGER
Electric current from power, telephone, and communication cables is hazardous. To avoid shock
hazard, disconnect the cables before opening the cover of this slot.
Attention: Before handling a 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.
To install or replace an M.2 wireless LAN card, do the following:
1. Turn off the computer, then disconnect the ac power adapter and all cables from the computer.
2. Remove the battery pack. See "Replacing the battery pack" on page 67.
3. Loosen the screws
the direction shown by the arrow
1 that secure the base cover assembly. Then remove the base cover assembly in
2 .
.
Chapter 6 Replacing devices
75