Remove The Cmos Battery; Remove The I/O Bracket (Left) - Lenovo 21DK0047IX Hardware Maintenance Manual

Remove the CMOS battery

Make sure the following FRU (or CRU) has been removed.
"Remove the lower case" on page 34
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 23. Disconnect the CMOS battery cable 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 34
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 number of the following replacement