Remove The Thermal Module - Lenovo Yoga C740 Series Hardware Maintenance Manual

"Remove the lower case" on page 26
"Remove the battery pack" on page 27
Step 1. Disconnect the cable from the I/O board and remove the RTC battery.
Figure 6. Disconnect the cable and remove the RTC battery
Go to
https://support.lenovo.com/partslookup
part:
RTC battery

Remove the thermal module

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 fan connectors from the I/O board.
to look up the Lenovo part number of the following replacement
.
Chapter 4 Removing a FRU or CRU
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