Remove The Wlan Card - Lenovo Yoga C740 Series Hardware Maintenance Manual

Figure 13. Remove the I/O board with cable
Go to
https://support.lenovo.com/partslookup
part:
I/O board with cable

Remove the WLAN card

Make sure the following FRU (or CRU) have been removed.
"Remove the lower case" on page 26
"Remove the battery pack" on page 27
Step 1. Disconnect the wireless antennas from the WLAN card.
Figure 14. Disconnect the wireless antennas
to look up the Lenovo part number of the following replacement
.
Chapter 4 Removing a FRU or CRU
33