Remove The System Board And The I/O Board Cable - Lenovo Legion 5 Series Hardware Maintenance Manual

"Remove the solid-state drive (SSD)" on page 30
Step 1. Detach the antenna cable connectors and disconnect the keyboard cable from the system board.
Figure 21. Detach the cables
Step 2. Disconnect the speaker cable from the system board and then remove the speakers.
Figure 22. Remove the speakers
Go to https://support.lenovo.com/partslookup
part:
Speakers

Remove the system board and the I/O board cable

Make sure the following FRUs (or CRUs) have been removed.
"Remove the lower case" on page 28
"Remove the battery pack" on page 29
"Remove the solid-state drive (SSD) plate" on page 30
"Remove the solid-state drive (SSD)" on page 30
"Remove the heat sink" on page 34
"Remove the Kensington lock bracket" on page 37
"Remove the DC-in bracket" on page 37
Step 1. Remove two screws and then remove the fan.
Step 2. Disconnect cables connected to the system board and detach the antenna cable connectors.
to look up the Lenovo part number of the following replacement
.
Chapter 4 Removing a FRU or CRU
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