Remove The System Board; Remove The Solid-State Drive (Ssd) Module; Remove The Wi-Fi Card; Remove The Heat Sink - Lenovo IdeaPad 5i Hardware Maintenance Manual

Figure 55. Remove the fingerprint board
Go to
https://support.lenovo.com/partslookup
replacement parts:
Fingerprint board
Fingerprint board cable

Remove the system board

Make sure the following FRUs (or CRUs) have been removed.
"Remove the lower case" on page 51
"Remove the battery pack" on page 52
"Remove the solid-state drive (SSD) module" on page 53
"Remove the Wi-Fi card" on page 56
"Remove the heat sink" on page 56
"Remove the fan" on page 57
Step 1. Disconnect cables connected to the system board.
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Hardware Maintenance Manual
to look up the Lenovo part numbers of the following