Remove The I/O Board (Thinkbook 14 Gen 6) - Lenovo ThinkBook 14 Gen 6 Hardware Maintenance Manual

Figure 21. Disconnect and remove the touchpad board cable.
Go to
https://support.lenovo.com/partslookup
replacement parts:
Touchpad board cable

Remove the I/O board (ThinkBook 14 Gen 6)

Make sure the following FRUs (or CRUs) have been removed.
"Remove the lower case" on page 28
"Remove the fan (ThinkBook 14 Gen 6)" on page 36
"Remove the heat sink" on page 37
"Remove the coin-cell battery" on page 38
Step 1. Pull out the antenna cables. Then, remove three screws and open the left hinge.
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Lenovo ThinkBook 14 Gen 6 and Lenovo ThinkBook 14 Gen 6 Hardware Maintenance Manual
to look up the Lenovo part numbers of the following