Lenovo Z40-75 - Manual (Page 47)

Appendix A. CRU instructions
41
0 Reconnect the two wireless LAN cables (one black, one grey).
A Reinstall the compartment cover and tighten the screws.
B Reinstall the battery pack.
C Turn the computer over again.
D Connect the AC power adapter and the cables to the computer.
Note: When installing or reinstalling the wireless card:
• In models with a wireless LAN card that has two cables:
Plug the black cable (MAIN) into the jack labeled M(Main).
Plug the grey cable (AUX) into the jack labeled A(Aux).
• In models with a wireless LAN card that has only one cable, plug the black cable
(MAIN) into the jack labeled M(Main).