Remove The Cmos Battery; Remove The I/O Bracket (Left) - Lenovo ThinkBook 15 Gen 2 Hardware Maintenance Manual

Go to
https://support.lenovo.com/partslookup
replacement parts:
Memory module
Memory module shielding

Remove the CMOS battery

Make sure the following FRU (or CRU) has been removed.
"Remove the lower case" on page 58
Step 1. Disconnect the battery pack cable from the system board.
Attention: Use your fingernails to pull the connector to unplug it. Do not pull the cable.
Step 2. Disconnect the CMOS battery cable from the I/O board and then remove the CMOS battery.
Figure 64. Disconnect the CMOS battery cable from the I/O board and remove the CMOS battery
Go to https://support.lenovo.com/partslookup
part:
CMOS battery

Remove the I/O bracket (left)

Make sure the following FRU (or CRU) has been removed.
"Remove the lower case" on page 58
Step 1. Disconnect the battery pack cable from the system board.
Attention: Use your fingernails to pull the connector to unplug it. Do not pull the cable.
Step 2. Remove six screws and then remove the I/O bracket (left).
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Hardware Maintenance Manual
to look up the Lenovo part numbers of the following
to look up the Lenovo part number of the following replacement